Whats an easy way to break down fractions

Multiply them by their whole number but what you do to one side, you must do to the other. 

Ex. 1/5 times 5 is 1 
But if you have a equation, you would have to multiply the other side by 5 for them to be equivalent and still the same. 

A’b’c’ are the coordinates to the new location of the transformed triangle abc. find the distance between the coordinates points to use for your calculations.