Name: SAT Math Help & School Math Mastery
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#33849

arithmetic

percentage

hard

100 sec

The positive number $A$ is $x %$ less than the positive number $B$ . The positive number $C$ is $y %$ greater than $A$ . If $C$ is equal to $B$ , which of the following equations must be true?

A.

$(100 - x) (100 + y) = 100$

B.

$(100 - x) (100 + y) = 10000$

C.

$(1 - x) (1 + y) = 1$

D.

$(1 - x /100) (1 + y /100) = 100$