Subtract 30/84 from 18/63
18/63 - 30/84 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
18/63 = 18 × 4/63 × 4 = 72/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
30/84 = 30 × 3/84 × 3 = 90/252 - Subtract the two like fractions:
72/252 - 90/252 = 72 - 90/252 = -18/252 - After reducing the fraction, the answer is -1/14
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