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Anonymous
4.5 since 10% is 9 and half of that is 4.5.
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5% of 90 is 4.5
90 - 5% = 90 x (1 - (5/100)) = $85.50
50 - 90% = 50 x (1 - (90/100)) = 50 x 0.1 = $5 Therefore, 90 percent off 50 dollars is equal to 5 dollars.
4.5
5%