Subtract 20/75 from 9/70, Solve 9/70

Subtract 20/75 from 9/70

9/70 - 20/75 is -29/210.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 75 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 70 × 15 = 1050,
9/70 = 9 × 15/70 × 15 = 135/1050
Likewise, for the 2nd fraction, since 75 × 14 = 1050,
20/75 = 20 × 14/75 × 14 = 280/1050
Subtract the two like fractions:
135/1050 - 280/1050 = 135 - 280/1050 = -145/1050
After reducing the fraction, the answer is -29/210

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