Subtract 15/9 from 90/84
1st number: 1 6/84, 2nd number: 1 6/9
90/84 - 15/9 is -25/42.
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,
90/84 = 90 × 3/84 × 3 = 270/252 - Likewise, for the 2nd fraction, since 9 × 28 = 252,
15/9 = 15 × 28/9 × 28 = 420/252 - Subtract the two like fractions:
270/252 - 420/252 = 270 - 420/252 = -150/252 - After reducing the fraction, the answer is -25/42
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