Ratios and Rates
Khan Academy - Video - Ratios Introduction
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-ratios-intro/v/ratios-intro
Math is Fun - What is a Ratio?
https://www.mathsisfun.com/numbers/ratio.html
Khan Academy - Video - Introduction to Rates
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-rates/v/introduction-to-rates
Virtual Nerd - What are Rates and Unit Rates?
http://virtualnerd.com/pre-algebra/ratios-proportions/rates-unit-rates/rate-unit-rate-examples/rate-and-unit-rates-definition
Softschools - Ratios Coloring Game
http://www.softschools.com/math/ratios/ratio_coloring_game/
Arcademic Skill Builders
http://www.arcademics.com/games/ratio-martian/ratio-martian.html
Unit Rates
AAA Math - Unit Rates
http://www.321know.com/rat-unit-rate.htm
Math is Fun - Unit Price Game
http://www.321know.com/rat-unit-rate.htm
Math Help - Unit Rates
https://www.mathhelp.com/how_to/ratio/unit_rate/#
Shmoop Video - Unit Rates
https://www.shmoop.com/video/unit-rate
IXL - Unit Rate Practice
https://www.ixl.com/math/grade-7/unit-rates
Khan Academy - Solving Unit Rates
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-rates/v/finding-unit-rates
Work with Percent
Khan Academy - Fraction to Decimal
https://www.khanacademy.org/math/arithmetic/arith-decimals/arith-review-decimals-to-fractions/v/converting-fractions-to-decimals-example
Math is Fun - Converting Fractions to Decimals
http://www.mathsisfun.com/converting-fractions-decimals.html
Math is Fun - Converting Fractions to Percents
http://www.mathsisfun.com/converting-fractions-percents.html
Math is Fun - Converting Percents to Fractions
http://www.mathsisfun.com/converting-percents-fractions.html
Math is Fun - Converting Decimals to Fractions
www.mathsisfun.com/converting-decimals-fractions.html
Math is Fun - Converting Decimals to Percents
www.mathsisfun.com/converting-decimals-percents.html
Percent Increase or Decrease
Math is Fun - Percentage Change
https://www.mathsisfun.com/numbers/percentage-change.html
Skills You Need - Percentage Change
https://www.skillsyouneed.com/num/percent-change.html
Percent Error
Math is Fun - Percentage Error
https://www.mathsisfun.com/numbers/percentage-error.html
Science Notes - Calculate Percent Error
https://sciencenotes.org/calculate-percent-error/
Multi-Step Percent Problems
Khan Academy - Solving Percent Problems
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-word-problems/v/solving-percent-problems
IXL - Multi-step Percent Problems Practice
https://www.ixl.com/math/grade-7/multi-step-problems-with-percents
Sofa Tutor - Multi-Step Problems
https://us.sofatutor.com/mathematics/videos/multi-step-problems-with-percent
Math Games - Percents with Multi-Step Problems
https://www.mathgames.com/skill/7.52-percents-with-multi-step-problems
Simple Interest
Virtual Nerd - What is the Formula for Simple Interest
http://virtualnerd.com/pre-algebra/percents/applications/simple-interest/simple-interest-formula-definition
Math Boot Camps - Simple Interest Formula and Examples
https://www.mathbootcamps.com/simple-interest-formula-and-examples/
Study.com - How to Find Simple Interest Rates: Definition, Formula and Examples
http://study.com/academy/lesson/how-to-find-simple-interest-rate-definition-formula-examples.html
Khan Academy - Video - Ratios Introduction
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-ratios-intro/v/ratios-intro
Math is Fun - What is a Ratio?
https://www.mathsisfun.com/numbers/ratio.html
Khan Academy - Video - Introduction to Rates
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-rates/v/introduction-to-rates
Virtual Nerd - What are Rates and Unit Rates?
http://virtualnerd.com/pre-algebra/ratios-proportions/rates-unit-rates/rate-unit-rate-examples/rate-and-unit-rates-definition
Softschools - Ratios Coloring Game
http://www.softschools.com/math/ratios/ratio_coloring_game/
Arcademic Skill Builders
http://www.arcademics.com/games/ratio-martian/ratio-martian.html
Unit Rates
AAA Math - Unit Rates
http://www.321know.com/rat-unit-rate.htm
Math is Fun - Unit Price Game
http://www.321know.com/rat-unit-rate.htm
Math Help - Unit Rates
https://www.mathhelp.com/how_to/ratio/unit_rate/#
Shmoop Video - Unit Rates
https://www.shmoop.com/video/unit-rate
IXL - Unit Rate Practice
https://www.ixl.com/math/grade-7/unit-rates
Khan Academy - Solving Unit Rates
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-rates/v/finding-unit-rates
Work with Percent
Khan Academy - Fraction to Decimal
https://www.khanacademy.org/math/arithmetic/arith-decimals/arith-review-decimals-to-fractions/v/converting-fractions-to-decimals-example
Math is Fun - Converting Fractions to Decimals
http://www.mathsisfun.com/converting-fractions-decimals.html
Math is Fun - Converting Fractions to Percents
http://www.mathsisfun.com/converting-fractions-percents.html
Math is Fun - Converting Percents to Fractions
http://www.mathsisfun.com/converting-percents-fractions.html
Math is Fun - Converting Decimals to Fractions
www.mathsisfun.com/converting-decimals-fractions.html
Math is Fun - Converting Decimals to Percents
www.mathsisfun.com/converting-decimals-percents.html
Percent Increase or Decrease
Math is Fun - Percentage Change
https://www.mathsisfun.com/numbers/percentage-change.html
Skills You Need - Percentage Change
https://www.skillsyouneed.com/num/percent-change.html
Percent Error
Math is Fun - Percentage Error
https://www.mathsisfun.com/numbers/percentage-error.html
Science Notes - Calculate Percent Error
https://sciencenotes.org/calculate-percent-error/
Multi-Step Percent Problems
Khan Academy - Solving Percent Problems
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-percent-word-problems/v/solving-percent-problems
IXL - Multi-step Percent Problems Practice
https://www.ixl.com/math/grade-7/multi-step-problems-with-percents
Sofa Tutor - Multi-Step Problems
https://us.sofatutor.com/mathematics/videos/multi-step-problems-with-percent
Math Games - Percents with Multi-Step Problems
https://www.mathgames.com/skill/7.52-percents-with-multi-step-problems
Simple Interest
Virtual Nerd - What is the Formula for Simple Interest
http://virtualnerd.com/pre-algebra/percents/applications/simple-interest/simple-interest-formula-definition
Math Boot Camps - Simple Interest Formula and Examples
https://www.mathbootcamps.com/simple-interest-formula-and-examples/
Study.com - How to Find Simple Interest Rates: Definition, Formula and Examples
http://study.com/academy/lesson/how-to-find-simple-interest-rate-definition-formula-examples.html