Subtract 12/21 from 63/3, Solve 21 0/3

Subtract 12/21 from 63/3

1^st number: 21 0/3, 2^nd number: 12/21

63/3 - 12/21 is 143/7.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21

Next, find the equivalent fraction of both fractional numbers with denominator 21
For the 1st fraction, since 3 × 7 = 21,
63/3 = 63 × 7/3 × 7 = 441/21
Likewise, for the 2nd fraction, since 21 × 1 = 21,
12/21 = 12 × 1/21 × 1 = 12/21
Subtract the two like fractions:
441/21 - 12/21 = 441 - 12/21 = 429/21
After reducing the fraction, the answer is 143/7
In mixed form: 203/7

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