Subtract 80/9 from 81/18
1st number: 4 9/18, 2nd number: 8 8/9
81/18 - 80/9 is -79/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 9 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
81/18 = 81 × 1/18 × 1 = 81/18 - Likewise, for the 2nd fraction, since 9 × 2 = 18,
80/9 = 80 × 2/9 × 2 = 160/18 - Subtract the two like fractions:
81/18 - 160/18 = 81 - 160/18 = -79/18
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