Basic Mathematics for College Students

570 Chapter 6 Percent

Percentmeans parts per one hundred.

The word percentcan be written using the symbol %.

DEFINITIONS AND CONCEPTS EXAMPLES

In the figure below, there are 100 equal-sized square regions, and

37 of them are shaded. We say that , or 37% , of the figure is

shaded.

Numerator

 37%

Per 100

37

100

10037

CHAPTER 6 SUMMARY AND REVIEW

SECTION 6.1 Percents, Decimals, and Fractions





STUDY SKILLS CHECKLIST

Percents, Decimals, and Fractions

Before taking the test on Chapter 6, read the following checklist. These skills are sometimes

misunderstood by students. Put a checkmark in the box if you can answer “yes” to the statement.

I know that to write a decimal as a percent, the

decimal point is moved two places to the rightand

a % symbol is inserted.

Decimal Percent

0.23 23%

0.768 76.8%

1.50 150%

0.9 90%

I know that to write a percent as a decimal, the %

symbol is dropped and the decimal point is moved

two places to the left.

Percent Decimal

44% 0.44

98.7% 0.987

0.5% 0.005

178.3% 1.783

I know that to write a fraction as a percent,a two-

step processis used:

75%

I know that to find the percent increase (or

decrease), we find what percent the amount of

increase (or decrease) is of the original amount.

The number of phone calls increased from

10 to 18 per day.

Original amount Amount of increase: 18  10  8

0.75

(^4) 3.00
 28
20
 20
0

3

4

Move the decimal

point two places

to the right

Divide the

numerator by

the denominator

percent



decimal



Fraction