Idea 23of 24Builds onTenths and hundredths as decimals
Percent means out of 100
What does 45% mean?
Today you'll discover
- what the % sign means
- why the whole is 100%
- how 7 out of 10 becomes a percent
Think first100 seats in a theatre: shaded seats are taken
What percent of the seats are taken?
Decide first, then press Next. Count the shaded squares out of 100.
A hundred grid with 45 squares shaded: four full columns and five more. The columns are outlined, then 45/100 and 0.45 are written, then 45% in large type. The last step shows 7/10 of the grid shaded for a test score.
See the whole ideathe big idea and the key word, in one place
The big idea
Percent means out of 100: 45% is 45/100, and the whole is 100%.
Around youA phone at 100% is fully charged; at 50% it is half charged; at 25% a quarter is left.
Easy to get wrongA percent is always out of 100. 7 out of 10 is not 7%; rename it first: 7/10 = 70/100 = 70%.
Key word
- percent
- out of 100; 45% means 45 out of 100, or 45/100
Ready to use it?
- Write a hundredths fraction as a percent.
- Turn a tenths fraction into a percent.