Pre-Algebra Demystified

In Type 1 problems, you are given the base and the rate and are asked to

find the part. From the circle: P¼RB. Here, then, you change the percent

to a decimal or fraction and multiply.

EXAMPLE

Find 40% of 80.

SOLUTION

Draw the circle and put 40% in the % section and 80 in the ‘‘of ’’ section

(see Fig. 6-4).

Change the percent to a decimal and multiply: 0.40 80 ¼32.

EXAMPLE

Find 25% of 60.

SOLUTION

Draw the circle and put 25 in the % section and 60 in the ‘‘of’’ section

(see Fig. 6-5).

Change 25% to a decimal and multiply: 0.25 60 ¼15.

114 CHAPTER 6 Percent

Fig. 6-4.

Fig. 6-5.