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50 - 90% = 50 x (1 - (90/100)) = 50 x 0.1 = $5 Therefore, 90 percent off 50 dollars is equal to 5 dollars.
90 - 5% = 90 x (1 - (5/100)) = $85.50
90 percent off of 6.99 is a savings of 6.29 for a final total of 0.70
5% of 90 is 4.5
40 percent off is the same as taking off 40/100 = 4/10so 40/100 = 2/5 = two fifths.so divide 5 into 150 =30 and multiply by 2 =60take the 60 from 150.00 and your answer is 90====================================Easier way:40 percent off leaves 60 percent on."60 percent" means "0.6",and "of" means "times".0.6 times 150 = 90