£11.22 : To increase an amount by a percentage, find the percentage amount, and then add this onto the original amount. 2% of £11 is 0.22. £11 + £0.22 = £11.22.
4 of 6
What is 500 miles decreased by 20%?
400 miles : To decrease an amount by a percentage, find the percentage amount, and then subtract this from the original amount. 20% of 500 miles is 100 miles. 500 miles - 100 miles = 400 miles.
5 of 6
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Percentages are out of 100, so to find one number as a percentage of another use equivalent fractions and make the denominator 100. \frac{8}{20} = \frac{40}{100} (multiply by 5), so \frac{8}{20} = 40\%.
6 of 6
Other cards in this set
Card 2
Front
What is 10% of 62?
Back
6.2: To find 10% of a number, divide the number by 10. 62 divided by 10 is 6.2.
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