Subtract 3/63 from 81/4, Solve 20 1/4

Subtract 3/63 from 81/4

1^st number: 20 1/4, 2^nd number: 3/63

81/4 - 3/63 is 1697/84.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 63 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 4 × 63 = 252,
81/4 = 81 × 63/4 × 63 = 5103/252
Likewise, for the 2nd fraction, since 63 × 4 = 252,
3/63 = 3 × 4/63 × 4 = 12/252
Subtract the two like fractions:
5103/252 - 12/252 = 5103 - 12/252 = 5091/252
After reducing the fraction, the answer is 1697/84
In mixed form: 2017/84

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