Answer: 240
Work Shown
x = original number
0.75x = 75% of that number
x - 0.75x = reduce by 75%
x - 0.75x = 0.25x = meaning you're left with 25% of the original number after reduction.
0.25x = 60
x = 60/0.25
x = 240 is the original number.
Note how dividing by 0.25 is the same as multiplying by 4. This is because 0.25 = 1/4; and dividing by 1/4 means multiplying by 4/1.
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Check:
240 = original number
75% of 240 = 0.75*240 = 180 and 240 - 180 = 60
This confirms the answer.
Or another way you could confirm is to write:
0.25*240 = 60