Subtract 9/8 from 12/84
1st number: 12/84, 2nd number: 1 1/8
12/84 - 9/8 is -55/56.
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,
12/84 = 12 × 2/84 × 2 = 24/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
9/8 = 9 × 21/8 × 21 = 189/168 - Subtract the two like fractions:
24/168 - 189/168 = 24 - 189/168 = -165/168 - After reducing the fraction, the answer is -55/56
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