Subtract 30/18 from 72/63
1st number: 1 9/63, 2nd number: 1 12/18
72/63 - 30/18 is -11/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 18 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 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Subtract the two like fractions:
144/126 - 210/126 = 144 - 210/126 = -66/126 - After reducing the fraction, the answer is -11/21
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