Math Word Problems Demystified - A Self Teaching Guide

3. P¼RB

P¼90% 110 ¼0.90 110 ¼ 99

4. B¼

P

R

B¼

$ 29 : 70

6 %

¼

$ 29 : 70

0 : 06

¼$ 495

5. P¼RB

P¼18% 50 ¼0.18 50 ¼9; 50
9 ¼ 41

6. P¼RB

P¼70% 80 ¼0.70 80 ¼56; 80
56 ¼ 24

7. $12,000
$9600¼$2400

R¼

P

B

R¼

$ 2400

$ 9600

¼ 0 : 25 ¼ 25 %

8. R¼

P

B

R¼

$ 4

$ 32

¼0.125¼12.5%

9. 18þ 32 ¼ 50

R¼

P

B

R¼

32

50

¼0.64¼64%

10. P¼RB

P¼10.5% 32 ¼0.105 32 ¼3.36 ounces

50 LESSON 5 Using Percents