dilaragok123 dilaragok123
  • 15-09-2018
  • Mathematics
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three-quarters of a number is 15
work out four-fifths of the number

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SkyeBesties
SkyeBesties SkyeBesties
  • 15-09-2018

Let the number be X

3/4 of X = 15


Multiplying out gives;

3X = 4x15

3X= 60

X = 20


Therefore, 4/5 of 20


Putting X = 20 we have;


4/5 x 20 = 16

Hope this help!

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