In a sale, there is twenty-five per cent off all prices. a chair costs £45 in the sale how much was it before the sale

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.