40% of $7
= 40% * 7
= 0.4 * 7
= $2.80
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40% off 7 dollars = 60% of 7 dollars = 7*60/100 = 4.20 dollars.
To calculate 40 percent of 40.00 dollars, you multiply 40.00 by 0.40. This results in 16.00 dollars. Therefore, 40 percent of 40.00 dollars is 16.00 dollars.
6.75
40% of 500 dollars = 500*40/100 = 200 dollars
40% of 98 dollars is 39.20 dollars