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A number is first increased by 20% and then the result is decreased by 20%. If the final value is 480, what was the original number?

Competition practicePercentage

A540
B480
C520
D500

Step-by-Step Solution

After the two changes the value is

xx 1.2 \times 0.8 = 0.96 x

. So

0.96 x = 480

, giving

x = 500

.

Answer: D) 500

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