percentages

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  • Created by: Izzy.258
  • Created on: 27-05-17 15:51
HOW DO YOU WORK OUT - FIND X% OF Y
TURN THE PERCENTAGE INTO A DECIMAL/FRACTION, THEN MULTIPLY .
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HOW DO YOU WORK OUT - FIND THE NEW AMOUNT AFTER A % INCREASE/ DECREASE
FIND THE MULTIPLIER - THE DECIMAL THAT REPRESENTS THE PERCENTAGE CHANGE. THEN YOU MULTIPLY THE ORIGINAL VALUE BY THE MULTIPLIER.
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HOW DO YOU WORK OUT - EXPRESS X AS A PERCENTAGE OF Y
DIVIDE X BY Y THEN MULTIPLY BY 100.
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HOW DO YOU WORK OUT - FIND THE PERCENTAGE CHANGE
PERCENTAGE CHANGE = CHANCE DIVIDED BY ORIGINAL X 100
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HOW DO YOU FIND OUT THE ORIGINAL VALUE?
1. WRITE OUT THE AMOUNT IN THE QUESTION AS A PERCENTAGE OF THE ORIGINAL VALUE. 2. DIVIDE TO FIND 1% OF THE ORIGINAL VALUE. 3. MULTIPLY BY 100 TO GIVE ORIGINAL VALUE(=100%)
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WHAT DOES SIMPLE INTEREST MEAN?
A CERTAIN PERCENTAGE OF THE ORIGINAL AMOUNT ONLYIS PAID AS REGULAR INTERVALS. SO THE AMOUNT OF INTEREST IS THE SAME EVERY TIME IT IS PAID
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*** DO YOU WORK OUT SIMPLE INTEREST?
1. WORK OUT THE AMOUNT OF INTEREST EARNED IN ONE YEAR. 2. MULTIPLY BY 4 TO GET THE TOTAL INTEREST FOR 4 YEARS.
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HOW DO YOU FIND THE PERCENTAGE INCREASE IN THE VOLUME OF A CUBE?
1. FIND THE VOLUME OF THE ORIGINAL CUBE. 2. FIND THE VOLUME OF THE CUBE AFTER THE INCREASE IN SIDE LENGTH. 3. WORK OUT THE INCREASE IN VOLUME. 4. CALCULATE THE PERCENTAGE INCREASE.
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Card 2

Front

HOW DO YOU WORK OUT - FIND THE NEW AMOUNT AFTER A % INCREASE/ DECREASE

Back

FIND THE MULTIPLIER - THE DECIMAL THAT REPRESENTS THE PERCENTAGE CHANGE. THEN YOU MULTIPLY THE ORIGINAL VALUE BY THE MULTIPLIER.

Card 3

Front

HOW DO YOU WORK OUT - EXPRESS X AS A PERCENTAGE OF Y

Back

Preview of the front of card 3

Card 4

Front

HOW DO YOU WORK OUT - FIND THE PERCENTAGE CHANGE

Back

Preview of the front of card 4

Card 5

Front

HOW DO YOU FIND OUT THE ORIGINAL VALUE?

Back

Preview of the front of card 5
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