Subtract 42/8 from 7/84
1st number: 7/84, 2nd number: 5 2/8
7/84 - 42/8 is -31/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
7/84 = 7 × 2/84 × 2 = 14/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
42/8 = 42 × 21/8 × 21 = 882/168 - Subtract the two like fractions:
14/168 - 882/168 = 14 - 882/168 = -868/168 - After reducing the fraction, the answer is -31/6
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