Math Word Problems Demystified - A Self Teaching Guide

TYPE 3: FINDING THE BASE

EXAMPLE:32 is 80% of what number?

SOLUTION:Since 32 is the part, place it in the top portion of the circle, and

since 80% is the rate, place it in the lower left portion of the circle and then

divide. See Figure RIII-5.

B¼

P

R

¼

32

80 %

¼

32

0 : 80

¼ 40

Fig. RIII-4.

Fig. RIII-5.

40 REFRESHER III Percents