Subtract 20/42 from 75/84
75/84 - 20/42 is 5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
75/84 = 75 × 1/84 × 1 = 75/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
20/42 = 20 × 2/42 × 2 = 40/84 - Subtract the two like fractions:
75/84 - 40/84 = 75 - 40/84 = 35/84 - After reducing the fraction, the answer is 5/12
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