Flashcards
Percentages
Cards in this deck (13)
- 1Convert a percentage into a fraction. X%X over 100.
- 2Convert X over 100 into a decimal.Divide by 100
- 3Convert a decimal into a % X.XXX.XX x 100
- 4Percentage of a Quantity7% of 84
84 divided by 100
Multiplied by 7 - 5Quantity of a Quantity as a Percentage36 of 80
36 divided by 80
Multiplied by 100
= 45% - 6Percentage increaseDifference between the final volume and the starting volume.. Divided by the start volume.
Multiplied by 100. - 7Percentage decreaseStart volume - final volume.. Divided by start volume.
Multiplied by 100. - 8Increasing by a % PercentageIncrease 2500 by 7%
Start volume = 100%
Final Volume = 100% + 7%
2500 divided by 100.
Multiply by 107 - 9Decrease by a %Decrease 2500 by 7%
Start Vol = 100%
Final Vol = 100 - 7 = 93%
2500 divided by 100.
Multiply by 93. - 10Repeated increase2500 by 7% each year.
2nd year: 2500 x 1.07 Squared
3rd year: 2500 x 1.07 cubed. - 11Repeated decreaseDecrease 2500 by 75& each year
2nd year: 2500 x 0.93 squared - 12Reverse Percentages IncreaseValue Increase by 11%
New value: 3700
Original Value?
3700 divided by 1.11 - 13Reverse percentages Value decreaseValue decrease by 8%
New Value: 480
Original value?
100-8= 0.92
480 divided by 0.92
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- Maths Flashcards on Percentages, created by pug004 on 23/06/2013.
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- pug004
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