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Anonymous
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It is a 55% decrease.
That will be -40%
38.9% decrease.
28% decrease.
40 = 5(x-10) 40 = 5x - 50 5x = 40 + 50 x = 90 / 5 x = 18 to check : 40 = (?) 5 (18 - 10) 40 = 5 (8) 40 = 40