Subtract 75/42 from 20/24
1st number: 20/24, 2nd number: 1 33/42
20/24 - 75/42 is -20/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
20/24 = 20 × 7/24 × 7 = 140/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
75/42 = 75 × 4/42 × 4 = 300/168 - Subtract the two like fractions:
140/168 - 300/168 = 140 - 300/168 = -160/168 - After reducing the fraction, the answer is -20/21
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