If a shop sells a bucket at £16 after a 15% discount, how much would the bucket have been before the discount?
Define the original cost as 100%.
So £16=85% (100-15) of the original cost.
Find 1% of the original cost by dividing both sides by 85.
16/85=85/85%
To find the orginal cost, 100%, multiply both sides by 100.
16/85 * 100 Is the answer.
This is equivilant to multiplying by 100/85 or dividing by 85/100 (as 1/85/100 = 85/100). Once understanding is reached this can be used as a shortcut as follows.
If there has been a 15% discount, divide by 1-0.15. If there has been an increase of 25%, divide by 1+0.25.
AG
Related Maths GCSE answers
All answers ▸Sam uses 140g of flour to make 12 cakes. How much flour will Sam need to make 21 cakes?
Find the median, mean, and mode of the following set of data: 55, 43, 62, 91, 2, 43, 34, 16, 16.
There are some people in a cinema. 3/5 of the people in the cinema are children. For the children in the cinema, number of girls:number of boys = 2:7. There are 170 girls in the cinema. Work out the number of adults in the cinema.
Solve the following quadratic equation x^(2)+7x+12