Students
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Teachers & Schools
Ratios, proportions, and percentages are all about comparing and measuring stuff. They can help us measure popularity, or find how rare something might be, or figure out a discount at our favorite store.
A ratio compares any two numbers, like the number of students who can do standing backflips to the number of students who can't. A proportion compares two equivalent ratios. A percentage compares any number to a total out of 100, like the number of corkscrew flips we landed out of 100 tries.
Whew. We're getting dizzy.
Concentration
This classic memory game
matches percents to fractions.
Comparing Fractions and Percents
The title says it all: this set of videos shows
you how to match up fractions with their percentage alter-egos.
Fraction-Percent Balance Scale
This scale allows you to balance percents and
fractions. It's a nice way to
compare the two.
Free Ride
Use bicycle gears to
explore relationships between two gears.
Galactic Exchange
Use ratios to determine
how much each coin is worth. Get a
pen and paper ready.
Scale Factor
Use this scale tool to
explore relationships between length, area, and perimeter.
The Golden Ratio
This page explores everything you need to know about the golden ratio and how it shows up in nature, architecture, and even cartoons.
Leonardo da Vinci Activity
This activity explores ratios and how they're used in drawing. Is your arm span really the same as your height? Find out!
Penguin Waiter Percent Game
This site offers a variety of word problems involving
tipping your waiter. Who is a penguin, obviously.
Fraction Maker!
It makes fractions! And percents and decimals, too. This is a handy tool that shows what various fractions, decimals, and percents look like visually.
Number Invaders-Percentage of a Number
Fight off space aliens using the awesome power of percents.
Percent Shopping
Need to work on your
shopping skills? Try this game and
find your discounts.