Subtract 81/75 from 20/42
1st number: 20/42, 2nd number: 1 6/75
20/42 - 81/75 is -317/525.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 75 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 42 × 25 = 1050,
20/42 = 20 × 25/42 × 25 = 500/1050 - Likewise, for the 2nd fraction, since 75 × 14 = 1050,
81/75 = 81 × 14/75 × 14 = 1134/1050 - Subtract the two like fractions:
500/1050 - 1134/1050 = 500 - 1134/1050 = -634/1050 - After reducing the fraction, the answer is -317/525
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