Subtract 81/72 from 28/35
1st number: 28/35, 2nd number: 1 9/72
28/35 - 81/72 is -13/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 35 × 72 = 2520,
28/35 = 28 × 72/35 × 72 = 2016/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
81/72 = 81 × 35/72 × 35 = 2835/2520 - Subtract the two like fractions:
2016/2520 - 2835/2520 = 2016 - 2835/2520 = -819/2520 - After reducing the fraction, the answer is -13/40
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