Subtract 81/24 from 18/20
1st number: 18/20, 2nd number: 3 9/24
18/20 - 81/24 is -99/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
18/20 = 18 × 6/20 × 6 = 108/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
81/24 = 81 × 5/24 × 5 = 405/120 - Subtract the two like fractions:
108/120 - 405/120 = 108 - 405/120 = -297/120 - After reducing the fraction, the answer is -99/40
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