Flashcards
Maths - Percentages
Cards in this deck (8)
- 1Maths Revision CardsSummer exams 2016
- 2I borrow £3000 for 4 months at an interest rate of 2½% per month, How much interest do I pay?3000 × 0.025 = 75
75 × 4 = £300 - 3The population of a town increases from 22,500 by 7% What is the new population?7% = 0.07
Multiplier for an increase of 7% = 1.07
22,500 × 1.07 = £24,075 - 4A car decreases (depreciates) in value from £18,000 by 15% What is it now worth?15% = 0.15
Multiplier for a decrease of 15% = 0.85
18,000 × 0.85 = £15,300 - 5A house was worth £135,000 last year but is now worth £150,000 Calculate the percentage increaseWork out the actual increase
15,000 - 135,000 = 15,000
work out this increase as a percentage of the original value
15,000
-------- = 0.11111 . . . . .
135,000 = 11% - 6A coat price has decreased by 20% and is now £150 What was the original price?150 = 80%
37.5 = 20%
187.5 = 100% - 7The population of a village has decreased by 10% and is now 7668. What was the population before this decrease?Original × Multiplier = New
Original × 0.9 = 7668
Original = 7668
------- = 8520
0.9 - 8The population of a village increased from 3540 by 10% then decreased by 4%. what is the resulting population?3540 × 1.1 × 0.96 = 3738.24
New Population = 3738
Information
- Description
- Includes: Simple Interest, Increases and Decreases, Calculating the original Value & Repeated Percentage Changes
- Created by
- Khaya Bhebhe
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- Created by Martha Davies · May 31, 2016
- Copied by Khaya Bhebhe · Nov 28, 2016
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