Subtract 12/25 from 15/90, Solve 15/90

Subtract 12/25 from 15/90

15/90 - 12/25 is -47/150.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 25 is 450

Next, find the equivalent fraction of both fractional numbers with denominator 450
For the 1st fraction, since 90 × 5 = 450,
15/90 = 15 × 5/90 × 5 = 75/450
Likewise, for the 2nd fraction, since 25 × 18 = 450,
12/25 = 12 × 18/25 × 18 = 216/450
Subtract the two like fractions:
75/450 - 216/450 = 75 - 216/450 = -141/450
After reducing the fraction, the answer is -47/150

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