Subtract 81/30 from 16/40
1st number: 16/40, 2nd number: 2 21/30
16/40 - 81/30 is -23/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
16/40 = 16 × 3/40 × 3 = 48/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
81/30 = 81 × 4/30 × 4 = 324/120 - Subtract the two like fractions:
48/120 - 324/120 = 48 - 324/120 = -276/120 - After reducing the fraction, the answer is -23/10
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