Subtract 15/9 from 18/84
1st number: 18/84, 2nd number: 1 6/9
18/84 - 15/9 is -61/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
18/84 = 18 × 3/84 × 3 = 54/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
15/9 = 15 × 28/9 × 28 = 420/252 - Subtract the two like fractions:
54/252 - 420/252 = 54 - 420/252 = -366/252 - After reducing the fraction, the answer is -61/42
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