7.4 is 10 percent of 74. If you take 7.4 off of 74 the result is 66.6 in total. If you literally take 10%, which is 0.1 off of 74, then 73.9 is the result.

Percent means hundredths. So 10% of something = 10/100 = 1/10 of it. 10% of $45.00 = (10/100)(45.00) = $4.50 So 10% off $45 is $4.50 off $45 45.00 - 4.50 = $40.50