Transcript Fractions, Decimals, and Percents

Fractions, Decimals, and Percents
Writing Percents as Decimals
Remove the percent symbol. Then divide by 100,
or just move the decimal point two places to the
left.
Example: 23% = 23.% = 0.23
Writing Decimals as Percents
Multiply by 100, or just move the decimal point
two places to the right. Then add a percent
symbol.
Example: 0.36 = 0.36 = 36%
Percent and Fractions
Since percents means per 100, to write p% as a
fraction, use p as the numerator and 100 as a
denominator. Then simplify.
Example:
Write 25% as a fraction
3
8
Write as a percent
Circle Graphs
Students in a class were asked to tell their favorite color.
a. What percent said red, blue, or yellow?
b. How many times more students said red than yellow?
c. Use two methods to find the percent of students who said green.
Which method do you prefer?
Homework
pg 361 # 3, 9, 11, 13, 17, 21, 22, 23, 31, 35, 41,
66-69