Subtract 8/7 from 18/63
1st number: 18/63, 2nd number: 1 1/7
18/63 - 8/7 is -6/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
18/63 = 18 × 1/63 × 1 = 18/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
8/7 = 8 × 9/7 × 9 = 72/63 - Subtract the two like fractions:
18/63 - 72/63 = 18 - 72/63 = -54/63 - After reducing the fraction, the answer is -6/7
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