Subtract 21/25 from 12/70, Solve 12/70

Subtract 21/25 from 12/70

12/70 - 21/25 is -117/175.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 25 is 350

Next, find the equivalent fraction of both fractional numbers with denominator 350
For the 1st fraction, since 70 × 5 = 350,
12/70 = 12 × 5/70 × 5 = 60/350
Likewise, for the 2nd fraction, since 25 × 14 = 350,
21/25 = 21 × 14/25 × 14 = 294/350
Subtract the two like fractions:
60/350 - 294/350 = 60 - 294/350 = -234/350
After reducing the fraction, the answer is -117/175

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