Subtract 18/84 from 3/27
3/27 - 18/84 is -13/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 84 is 756
Next, find the equivalent fraction of both fractional numbers with denominator 756 - For the 1st fraction, since 27 × 28 = 756,
3/27 = 3 × 28/27 × 28 = 84/756 - Likewise, for the 2nd fraction, since 84 × 9 = 756,
18/84 = 18 × 9/84 × 9 = 162/756 - Subtract the two like fractions:
84/756 - 162/756 = 84 - 162/756 = -78/756 - After reducing the fraction, the answer is -13/126
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