cteid22 cteid22

24-01-2016
Mathematics

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50% of Number is 250 what is 80% of that number

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Billymkhoi Billymkhoi

25-01-2016

We have an equation: 250/?= 50/100

Cross multiply:
50*?= 250*100
⇒ ?= 250*100/50= 500

The number is 500~

We have another equation: ?/500= 80/100

Cross multiply:
100*?= 80*500
⇒?= 80*500/100= 400

80% of 500 is 400~

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