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21-01-2016
Mathematics

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60 minutes it 20% of blank minutes

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Billymkhoi Billymkhoi

21-01-2016

We have a proportion: 60/?= 20/100

Cross multiply:
20*?= 60*100
⇒ ?= 60*100/20= 300

60 minutes is 20% of 300 minutes~

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