Subtract 18/14 from 63/21, Solve 3 0/21

Subtract 18/14 from 63/21

1^st number: 3 0/21, 2^nd number: 1 4/14

63/21 - 18/14 is 12/7.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 21 × 2 = 42,
63/21 = 63 × 2/21 × 2 = 126/42
Likewise, for the 2nd fraction, since 14 × 3 = 42,
18/14 = 18 × 3/14 × 3 = 54/42
Subtract the two like fractions:
126/42 - 54/42 = 126 - 54/42 = 72/42
After reducing the fraction, the answer is 12/7
In mixed form: 15/7

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