We can quickly calculate 10% of this value by simply moving the decimal point to the left one place. We get $5.40. Next to find 20% we simply double the value for 10% and get $10.80. Finally, we subtract from 54 dollars to get $43.20, the price remaining after a 20% deduction on a 54 dollar purchase.
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10% off $54 = $54 - (0.1 x $54) = $48.60
20% of 54 = 54 x (1 - (20/100)) = 54 x 0.8 = 43.2
60 percent off 54 is 32.4.
To find 20 percent of a number, multiply the number by 0.2. In this instance, 0.2 x 54 = 10.8. Therefore, 20 percent of 54 is equal to 10.8.
54 dollars