Subtract 81/10 from 7/2
1st number: 3 1/2, 2nd number: 8 1/10
7/2 - 81/10 is -23/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 10 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
7/2 = 7 × 5/2 × 5 = 35/10 - Likewise, for the 2nd fraction, since 10 × 1 = 10,
81/10 = 81 × 1/10 × 1 = 81/10 - Subtract the two like fractions:
35/10 - 81/10 = 35 - 81/10 = -46/10 - After reducing the fraction, the answer is -23/5
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