Subtract 90/24 from 21/9
1st number: 2 3/9, 2nd number: 3 18/24
21/9 - 90/24 is -17/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 9 × 8 = 72,
21/9 = 21 × 8/9 × 8 = 168/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
90/24 = 90 × 3/24 × 3 = 270/72 - Subtract the two like fractions:
168/72 - 270/72 = 168 - 270/72 = -102/72 - After reducing the fraction, the answer is -17/12
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