How do I turn 89 is 10% of what number? Into a equation ?

Question

Forgot how to do this and forgot the steps on how to do it

Answer 1

You can also do this:

 

89 / x = 10 / 100

 

 

where x is the number that 89 is part of.  10/100 is the same as 10%.

 

The equation could be reduced to

 

89 / x = 1 / 10      for simplicity.

 

 

 

If you cross-multiply, you get an equation that contains no denominator.

Answer 2

89   is    10%   of what number

89   =    0.10    ·         x

 

89 = 0.1x 

890 = x            divide both sides by 0.1