Free practice · numeric · hard
Practice
Reverse a discount
After a 20% discount, an item costs 640. What was its original price?
Reverse-percentage model
The final price represents only the percentage that remains
- Original?Unknown 100% base
- Discount20%Percentage removed
- Remaining80%0.80 multiplier
- Final640Known 80% amount
Original-price relationship640 ÷ 0.80 = original
Recover the unknown 100% base by dividing the final amount by the remaining decimal multiplier.