Question 37329
shoes now $100. They were originally $x. 


ALL precentages work on the ORIGINAL so we figure out what 25% of x is, take this away from x and that has to be 100.


So: start with x
25% of x MEANS (25/100)x which is 0.25x
we take this from x: x-0.25x
so the mathematical bit for the reduction is 0.75x, which you had.
And this equals 100, so 0.75x = 100
--> x = 100/0.75
--> x = $133.33


If your teacher gave $125 as the answer then i hope to God that they are suffering from some mental abberation. If not, and that was their best attempt at this question then they should not be a maths teacher.


Jon.






jon.