Emma has received a 35 percent discount on the frame
A discount is a reduction in price of an item usually for promotion or marketing purposes.
A discount could be in the form of a percentage off the price of the item or a fixed amount(say $7) off the price of the item
In the case of Emma, he got a fixed amount off the price which we converted to percentage to determine the amount off. This is calculated thus:
discount price/price of item ×100/1
5.25/15×100/1= 0.35(35%)
If a percentage is used, a variable( can change)amount in the form of a discount is possible otherwise not.
Please read more on discounts and percentages here:
https://brainly.com/question/21557112