you multiply by its denominator to each side.
Example: 3x/5=9 now multiply by 5 to each side
3x/5 times 5 is 3x and 9 times 5 is 45 so you get 3x=45 now divide by 3 to each side and you get x=15
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Here is how you solve this. You call your number "x", and write:x = 0.5454... 100x = 54.5454... Then you subtract the first equation from the second, and solve the resulting equation for "x". This will give you "x" as a fraction. Simplify as appropriate.
To solve a Dissimilar Fraction,you must change the denominator to a similar fraction then proceed with the Adding/Subtracting Dissimilar Fraction...
You would normally start by multiplying both sides of the equation by whatever is in the DENOMINATOR (the bottom part of the fraction), to get rid of fractions.
You need to call your number "x", then write the following two equations:(Equation 1) x = 0.727272... Multiplying by 100, you get: (Equation 2) 100x = 72.727272... If you subtract equation 1 from equation 2, and solve for "x", you will get the number as a fraction.
the fraction means for you to divide but if you are doing inverse operation, you are multiplying.