If 30% of r is equal to 75% of s, what is 50% of s if r = 30?

If 30% of r is equal to 75% of s, what is 50% of s if r = 30?
A . 4.5
B . 6
C . 9
D . 12
E . 15

Answer: B

Explanation:

If r = 30, 30% of r = 0.30 × 30 = 9. 9 is equal to 75% of s. If 0.75s = 9, then s = 12. 50% of s = 0.50 × 12 =

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