Subtract 72/70 from 3/27, Solve 3/27

Subtract 72/70 from 3/27

1^st number: 3/27, 2^nd number: 1 2/70

3/27 - 72/70 is -289/315.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 70 is 1890

Next, find the equivalent fraction of both fractional numbers with denominator 1890
For the 1st fraction, since 27 × 70 = 1890,
3/27 = 3 × 70/27 × 70 = 210/1890
Likewise, for the 2nd fraction, since 70 × 27 = 1890,
72/70 = 72 × 27/70 × 27 = 1944/1890
Subtract the two like fractions:
210/1890 - 1944/1890 = 210 - 1944/1890 = -1734/1890
After reducing the fraction, the answer is -289/315

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