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

Set up an equation.

Let w = whole number

84 = 0.70w

84/0.70 = w

120 = w

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 =

              = 0.7x

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

0.7x = 84

x =

x =

x = 120

Therefore, the whole number was 120.

this is not the answer this is just a question. is this middle school math?

step-by-step explanation: