Key Skills -- Application of Numbers



$Exercise2 (Conversion of percentages to fractions and conversion of percentages to decimal numbers)$







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This is a supporting activity to reinforce learning.

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Increasing and Decreasing Percentages

Method

Divide the original amount by 100, obtaining 1%
Multiply by the required percentage increase or decrease
Add or subtract this from the original amount

Examples

	Step 1	Step 2	Step 3
Increase 150 by 10% :	150 ÷ 100 = 1.5	therefore 10% = 15	adding this to the original gives 165
Decrease 180 by 5% :	180 ÷ 100 = 1.8	therefore 5% = 9	subtracting this from the original gives 171

Quiz / Exercises

Increase / decrease percentages

Increase 345 by 10%
Increase 230 by 45%
Increase 45 by 23%
Increase 145 by 75%
Increase 115 by 12%

Decrease 345 by 10%
Decrease 230 by 45%
Decrease 45 by 23%
Decrease 145 by 75%
Decrease 115 by 12%

Please type your answers into the corresponding spaces below.

Please answer to two decimal places.