Reverse Percentages

Ellen Billingham
Mind Map by , created over 6 years ago

GCSE Maths (Year 8 Number 1) Mind Map on Reverse Percentages, created by Ellen Billingham on 05/06/2013.

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Ellen Billingham
Created by Ellen Billingham over 6 years ago
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Reverse Percentages
1 OA X MULTIPLIER = NA
2 I bought a jacket which was in a sale, and after being deducted by 20%, it cost £15. What was the original price?
2.1 OA x multiplier = NA
2.1.1 OA x 0.8 = 15
2.1.1.1 15/0.8
2.1.1.1.1 £18.75
3 I invested some of my money in a bank and it earned 3% interest every year, if it had £2884 after one year, how much did I invest?
3.1 OA x multiplier = NA
3.1.1 OA x 1.03 = 2884
3.1.1.1 2884/1.03
3.1.1.1.1 £2800

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