Subtract 18/7 from 42/84
1st number: 42/84, 2nd number: 2 4/7
42/84 - 18/7 is -29/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
42/84 = 42 × 1/84 × 1 = 42/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
18/7 = 18 × 12/7 × 12 = 216/84 - Subtract the two like fractions:
42/84 - 216/84 = 42 - 216/84 = -174/84 - After reducing the fraction, the answer is -29/14
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