First, set up a proportion. Let x= the percent (out of 100) 54 is out of 90. Now, you should write the proportion x/100 = 54/90. One way of solving this proportion is to first simplify the right side's fraction. Thus, you will get 6/9 after dividing both its numerator and denominator by 10. Now, you have x/100 = 6/9 as your new proportion. Multiply numerators and denominators of opposite fractions to get this equation: 9x = 6(100). 9x=600 may be solved by dividing both sides by 9, and you will have your answer.
