Subtract 90/9 from 18/8
1st number: 2 2/8, 2nd number: 10 0/9
18/8 - 90/9 is -31/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 9 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 8 × 9 = 72,
18/8 = 18 × 9/8 × 9 = 162/72 - Likewise, for the 2nd fraction, since 9 × 8 = 72,
90/9 = 90 × 8/9 × 8 = 720/72 - Subtract the two like fractions:
162/72 - 720/72 = 162 - 720/72 = -558/72 - After reducing the fraction, the answer is -31/4
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