Subtract 90/8 from 9/12
1st number: 9/12, 2nd number: 11 2/8
9/12 - 90/8 is -21/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 8 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
9/12 = 9 × 2/12 × 2 = 18/24 - Likewise, for the 2nd fraction, since 8 × 3 = 24,
90/8 = 90 × 3/8 × 3 = 270/24 - Subtract the two like fractions:
18/24 - 270/24 = 18 - 270/24 = -252/24 - After reducing the fraction, the answer is -21/2
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