60 dollars
40% off = 60% 60% of 21 dollars = 21*60/100 = 12.60 dollars
60% off of 148 dollars = 40% of 148 dollars = 148*40/100 dollars = 59.2 dollars
40% off 7 dollars = 60% of 7 dollars = 7*60/100 = 4.20 dollars.
40% off 37 dollars = 60% of 37 dollars = 37*60/100 = 22.20 dollars
60 dollars
60 dollars
40% off = 60% 60% of 21 dollars = 21*60/100 = 12.60 dollars
60% off of 148 dollars = 40% of 148 dollars = 148*40/100 dollars = 59.2 dollars
40% off 7 dollars = 60% of 7 dollars = 7*60/100 = 4.20 dollars.
40% off 37 dollars = 60% of 37 dollars = 37*60/100 = 22.20 dollars
50 dollars - 40% = 60% [left] of 50 dollars = 50*60/100 = 30 dollars.
40% off 14 dollars leaves you with 60% of 14 dollars. 60% of 14 dollars = 14*60/100 = 8.40 dollars.
20 dollars are 100 percent. You want 40 percent off, that means you want 60 percent. 20/100 = 0.2 is 1 percent that value times 60 gives the wanted 60 percent. You have to pay only 0.2 times 60 = 12 dollars instead of 20 dollars.
40% off 171 dollars = 60% [left] of 171 dollars = 171*60/100 = 102.6 dollars
60% off of 166 dollars = 40% left of 166 dollars = 166*40/100 = 66.40 dollars.
40% off of 20 dollars = 60% of 20 dollars (100 - 40 = 60) = 20*60/100 = 12 dollars