Subtract 7/27 from 42/70, Solve 42/70

Subtract 7/27 from 42/70

42/70 - 7/27 is 46/135.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1890
For the 1st fraction, since 70 × 27 = 1890,
42/70 = 42 × 27/70 × 27 = 1134/1890
Likewise, for the 2nd fraction, since 27 × 70 = 1890,
7/27 = 7 × 70/27 × 70 = 490/1890
Subtract the two like fractions:
1134/1890 - 490/1890 = 1134 - 490/1890 = 644/1890
After reducing the fraction, the answer is 46/135

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