Subtract 81/8 from 42/72
1st number: 42/72, 2nd number: 10 1/8
42/72 - 81/8 is -229/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 8 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 72 × 1 = 72,
42/72 = 42 × 1/72 × 1 = 42/72 - Likewise, for the 2nd fraction, since 8 × 9 = 72,
81/8 = 81 × 9/8 × 9 = 729/72 - Subtract the two like fractions:
42/72 - 729/72 = 42 - 729/72 = -687/72 - After reducing the fraction, the answer is -229/24
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