mamdouh3009 mamdouh3009
  • 15-01-2019
  • Mathematics
contestada

If you know that 84 is 70% of a whole, explain how you can use proportional reasoning to determine the whole

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harpazo
harpazo harpazo
  • 15-01-2019

Set up an equation.


Let w = whole number


84 = 0.70w


84/0.70 = w


120 = w


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eudora eudora
  • 01-12-2019

Answer:

The whole number was 120.

Step-by-step explanation:

Let the whole number that is to be determined is = x

Then 70% of this number = 70% of x

Replace 'of' by the sign of multiplication

70% of x = [tex]x\times \frac{70}{100}[/tex]

              = 0.7x

If 70% of x is equal to 84 then the expression will be

0.7x = 84

x = [tex]\frac{84}{0.7}[/tex]

x = [tex]\frac{840}{7}[/tex]

x = 120

Therefore, the whole number was 120.

Answer Link

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