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Colin Dodds - Percentages (Math Song)

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Published on Mar 8, 2012

A percentage is a ratio that compares a number to 100
A percentage expresses a number as a fraction of 100
"A part of 100" is what percent means in Latin
Now let's take a look at those percentages in action!

90% on a test - that's good!
10% of the weekend left - that's bad!
40% chips in your party mix - that's good!
100% of just pretzel sticks - that's bad!

Percentages are related to decimals and fractions
It's easy to quickly convert your numbers into them
1% is the same as 1/100 or 0.01
100% is the same as 100/100 or 1

A percentage is a ratio that compares a number to 100
A percentage expresses a number as a fraction of 100
To calculate a percentage increase or decrease, follow this formula please
Percentage change = (later - earlier)/earlier x 100
To get the percentage change from 32 to 24
Plug in (24 - 32)/32
Multiply by 100 and then you get a percentage

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Song and video by Colin Dodds

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