Subtract 4/27 from 12/20, Solve 12/20

Subtract 4/27 from 12/20

12/20 - 4/27 is 61/135.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 27 is 540

Next, find the equivalent fraction of both fractional numbers with denominator 540
For the 1st fraction, since 20 × 27 = 540,
12/20 = 12 × 27/20 × 27 = 324/540
Likewise, for the 2nd fraction, since 27 × 20 = 540,
4/27 = 4 × 20/27 × 20 = 80/540
Subtract the two like fractions:
324/540 - 80/540 = 324 - 80/540 = 244/540
After reducing the fraction, the answer is 61/135

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