06-10-2016
Mathematics

contestada

When a number is decreased by 20% of itself, the result is 20. What is the number?

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apologiabiology apologiabiology

06-10-2016

decreased by 20% means multiplied by 80%
80% of number=20
divide both sides by 4
20% of number=5
times 5 both sides
100% of number=25

the number is 25

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