Exercise 2 Page 379

Fractions, decimals, and percents are three ways to show parts of a whole. We want to write a percent as a fraction and as a decimal. We will do these one at the time, but first let's start by calculating the quotient of the fraction to simplify the percent. 7/10 % = 0.7 %

Fraction

To write a percent as a fraction, we write the number part as a numerator over 100. 0.7 %=0.7/100 Then, if possible, we simplify the fraction.

0.7/100

ExpandFrac

a/b=a * 10/b * 10

0.7* 10/100* 10

Multiply

Multiply

7/1000

We found that 710 % expressed as a fraction is 0.7100, or 71000.

Decimal

To write a percent as a decimal, we ignore the percent symbol and move the decimal point two places to the left.

We found that 710 % expressed as a decimal is 0.007.