Subtract 21/27 from 14/63, Solve 14/63

Subtract 21/27 from 14/63

14/63 - 21/27 is -5/9.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 27 is 189

Next, find the equivalent fraction of both fractional numbers with denominator 189
For the 1st fraction, since 63 × 3 = 189,
14/63 = 14 × 3/63 × 3 = 42/189
Likewise, for the 2nd fraction, since 27 × 7 = 189,
21/27 = 21 × 7/27 × 7 = 147/189
Subtract the two like fractions:
42/189 - 147/189 = 42 - 147/189 = -105/189
After reducing the fraction, the answer is -5/9

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