Pre-Algebra Demystified

Change 42% to 0.42 and divide: 2940.42¼700.

EXAMPLE

36 is 80% of what number?

SOLUTION

Draw the circle and place 36 in the ‘‘is’’ section and 80 in the percent section

(see Fig. 6-11).

Change 80% to 0.80 and divide: 360.80¼45.

PRACTICE

1. 2% of what number is 46?


2. 150 is 50% of what number?


3. 42 is 60% of what number?


4. 30% of what number is 27?


5. 18.6% of what number is 139.5?

118 CHAPTER 6 Percent

Fig. 6-10.

Fig. 6-11.