Question

after the cashier rings up your total, you're surprised to see what you owe for all of the items, you were charged $29.75. The receipt says the original amount, before the sale, was $85. what discount did you receive?

Answer 1

In order to calculate the discount, first let's find what percentage of the original amount was paid, by dividing the value charged by the original amount:

`(29.75)/(85)=0.35=35\text{\%}`

If the price charged is 35% of the original amount, the discount received is 100% minus this percentage:

`\text{discount}=100\text{\%}-35\text{\%}=65\text{\%}`

So the discount received is 65% of the original amount, that is, $55.25