Subtract 63/42 from 27/9, Solve 3 0/9

Subtract 63/42 from 27/9

1^st number: 3 0/9, 2^nd number: 1 21/42

27/9 - 63/42 is 3/2.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 9 × 14 = 126,
27/9 = 27 × 14/9 × 14 = 378/126
Likewise, for the 2nd fraction, since 42 × 3 = 126,
63/42 = 63 × 3/42 × 3 = 189/126
Subtract the two like fractions:
378/126 - 189/126 = 378 - 189/126 = 189/126
After reducing the fraction, the answer is 3/2
In mixed form: 11/2

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