A. 600 is % of 500 b. 100 is % more than 40.

9514 1404 393

  A. 120%

  B. 150%

Step-by-step explanation:

a. Let 'a' represent the percentage of interest.

  600 = a% × 500

  600/500 = a/100 . . . . . . . % means /100

  100(6/5) = a = 120

  600 is 120 % of 500

__

b. Let 'b' represent the percentage of interest. The given statement means ...

  100 = 40 + b% × 40

  100 = 40(1 +b/100) . . . . . factor out 40, use /100 for %

  2.50 = 1 +b/100 . . . . . . . divide by 40

  1.50 = b/100 . . . . . . . . . . subtract 1

  150 = b . . . . . . . . . . . . . . multiply by 100

100 is 150 % more than 40

table 1

step-by-step explanation:

1-16

2-32

4-64

8-128

all multiples of 16