Subtract 7/63 from 63/21, Solve 3 0/21

Subtract 7/63 from 63/21

1^st number: 3 0/21, 2^nd number: 7/63

63/21 - 7/63 is 26/9.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 21 × 3 = 63,
63/21 = 63 × 3/21 × 3 = 189/63
Likewise, for the 2nd fraction, since 63 × 1 = 63,
7/63 = 7 × 1/63 × 1 = 7/63
Subtract the two like fractions:
189/63 - 7/63 = 189 - 7/63 = 182/63
After reducing the fraction, the answer is 26/9
In mixed form: 28/9

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