Subtract 72/63 from 1/6, Solve 1/6 - 1 9/63 as a fraction

Subtract 72/63 from 1/6

1^st number: 1/6, 2^nd number: 1 9/63

1/6 - 72/63 is -41/42.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 6 × 21 = 126,
1/6 = 1 × 21/6 × 21 = 21/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
72/63 = 72 × 2/63 × 2 = 144/126
Subtract the two like fractions:
21/126 - 144/126 = 21 - 144/126 = -123/126
After reducing the fraction, the answer is -41/42

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