Subtract 63/35 from 21/27, Solve 21/27

Subtract 63/35 from 21/27

1^st number: 21/27, 2^nd number: 1 28/35

21/27 - 63/35 is -46/45.

Find the least common denominator or LCM of the two denominators:
LCM of 27 and 35 is 945

Next, find the equivalent fraction of both fractional numbers with denominator 945
For the 1st fraction, since 27 × 35 = 945,
21/27 = 21 × 35/27 × 35 = 735/945
Likewise, for the 2nd fraction, since 35 × 27 = 945,
63/35 = 63 × 27/35 × 27 = 1701/945
Subtract the two like fractions:
735/945 - 1701/945 = 735 - 1701/945 = -966/945
After reducing the fraction, the answer is -46/45

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