Subtract 3/35 from 21/27, Solve 21/27

Subtract 3/35 from 21/27

21/27 - 3/35 is 218/315.

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,
3/35 = 3 × 27/35 × 27 = 81/945
Subtract the two like fractions:
735/945 - 81/945 = 735 - 81/945 = 654/945
After reducing the fraction, the answer is 218/315

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