80 * 75/100 = 60 dollars
50% off 80 dollars = 40 dollars.
If you take 80% of 80 dollars away, you are left with 16 dollars.
24 dollars :)
32
80% of $25 is $20, so 80% off would be $5.
80 * 75/100 = 60 dollars
80% of 60 dollars = 60*80/100 = 48 dollars
That is 60 dollars.
50% off 80 dollars = 40 dollars.
If you take 80% of 80 dollars away, you are left with 16 dollars.
24 dollars :)
32
To calculate 'percent off' you can subtract the percent from 100%, then multiply by the amount, or multiply the percent by the amount, then subtract that from the original amount: 100% - 40% = 60%. (60%) x $80 = $48 (so $48 is the new price). (40%) x $80 = $32 (the amount of the discount is $32). $80 - $32 = $48
20% off of 5 dollars = 80% of 5 dollars = 5*80/100 = 4 dollars.
20% off of 156 dollars = 80% of 156 dollars = 156/80/100 = 124.8 dollars
20% off 37 dollars = 80% of 37 dollars = 37*80/100 = 29.60 dollars.