A grocery basket costs 64 dollars before a 12.5% discount. What is the discounted total? Enter the amount in dollars.

توضیح

The customer pays 87.5% of the original, so 64 × 87.5 / 100 = 56 dollars. The calculation 64 × 12.5 / 100 = 8 finds the saving alone, not the amount still payable.