Subtract 28/20 from 35/42
1st number: 35/42, 2nd number: 1 8/20
35/42 - 28/20 is -17/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
35/42 = 35 × 10/42 × 10 = 350/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
28/20 = 28 × 21/20 × 21 = 588/420 - Subtract the two like fractions:
350/420 - 588/420 = 350 - 588/420 = -238/420 - After reducing the fraction, the answer is -17/30
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