Subtract 28/20 from 4/42
1st number: 4/42, 2nd number: 1 8/20
4/42 - 28/20 is -137/105.
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,
4/42 = 4 × 10/42 × 10 = 40/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
28/20 = 28 × 21/20 × 21 = 588/420 - Subtract the two like fractions:
40/420 - 588/420 = 40 - 588/420 = -548/420 - After reducing the fraction, the answer is -137/105
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