Idea 18of 22Builds onHow many out of how many
As a fraction, a decimal or a percent
How can one relative frequency be written three ways?
Today you'll discover
- how to turn a fraction into hundredths
- hundredths as a decimal
- hundredths as a percent
Think first10/25 take the bus
10/25 of the students take the bus. What is that as a percent?
Decide first, then press Next. Make the bottom number 100 first.
The travel table: bus 10, walk 8, car 5, bike 2, out of 25. Beside the fractions, a decimal column appears: 0.40, 0.32, 0.20, 0.08, and a percent column: 40%, 32%, 20%, 8%; the total row reads 1 and 100%. The last step shows the sports table: soccer 7, hockey 5, swimming 4, basketball 4, out of 20.
See the whole ideathe big idea and the key word, in one place
The big idea
One relative frequency can be a fraction, a decimal or a percent: 10/25 = 0.40 = 40%.
Through hundredths
Make the bottom 100, then read it as hundredths: a decimal, and a percent.
- fraction10/25
- hundredths40/100
- decimal0.40
- percent40%
Easy to get wrong0.4 and 0.40 are the same: 4 tenths is 40 hundredths, which is 40%, not 4%.
Key word
- percent
- out of 100: 40% means 40 out of every 100
Ready to use it?
- Write a relative frequency as a fraction, a decimal and a percent.