Subtract 21/70 from 4/27, Solve 4/27

Subtract 21/70 from 4/27

4/27 - 21/70 is -41/270.

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,
4/27 = 4 × 70/27 × 70 = 280/1890
Likewise, for the 2nd fraction, since 70 × 27 = 1890,
21/70 = 21 × 27/70 × 27 = 567/1890
Subtract the two like fractions:
280/1890 - 567/1890 = 280 - 567/1890 = -287/1890
After reducing the fraction, the answer is -41/270

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