Subtract 81/10 from 72/28
1st number: 2 16/28, 2nd number: 8 1/10
72/28 - 81/10 is -387/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
72/28 = 72 × 5/28 × 5 = 360/140 - Likewise, for the 2nd fraction, since 10 × 14 = 140,
81/10 = 81 × 14/10 × 14 = 1134/140 - Subtract the two like fractions:
360/140 - 1134/140 = 360 - 1134/140 = -774/140 - After reducing the fraction, the answer is -387/70
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