Subtract 15/6 from 81/40
1st number: 2 1/40, 2nd number: 2 3/6
81/40 - 15/6 is -19/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 6 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
81/40 = 81 × 3/40 × 3 = 243/120 - Likewise, for the 2nd fraction, since 6 × 20 = 120,
15/6 = 15 × 20/6 × 20 = 300/120 - Subtract the two like fractions:
243/120 - 300/120 = 243 - 300/120 = -57/120 - After reducing the fraction, the answer is -19/40
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