Subtract 8/42 from 72/63
1st number: 1 9/63, 2nd number: 8/42
72/63 - 8/42 is 20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
72/63 = 72 × 2/63 × 2 = 144/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
8/42 = 8 × 3/42 × 3 = 24/126 - Subtract the two like fractions:
144/126 - 24/126 = 144 - 24/126 = 120/126 - After reducing the fraction, the answer is 20/21
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