Subtract 20/30 from 10/27, Solve 10/27

Subtract 20/30 from 10/27

10/27 - 20/30 is -8/27.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 30 is 270

Next, find the equivalent fraction of both fractional numbers with denominator 270
For the 1st fraction, since 27 × 10 = 270,
10/27 = 10 × 10/27 × 10 = 100/270
Likewise, for the 2nd fraction, since 30 × 9 = 270,
20/30 = 20 × 9/30 × 9 = 180/270
Subtract the two like fractions:
100/270 - 180/270 = 100 - 180/270 = -80/270
After reducing the fraction, the answer is -8/27

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