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20 percent of 45 = (20 / 100) x 45 = 9.
45 x 20 ÷ 100 =9
45 x 0.2 = 9
20% off $45 20% equates to 20/100 so 20% of 45 = 45 x 20/100 = 9. 20% of $45 = 9 Therefore 20% off $45 = 45 - 9 = $36
It's rather simple after you think about it in terms of Money. Example: G = GROSS .20 = % 45 = NET G x .20 = 45 Now, use your COMMUNICATIVE property: G x .20 = 45 -------- ---- .20 .20 G = 45 ---- .20 G = 225 So, the answer to your question, $45 is 20% of $225