Subtract 20/7 from 75/84
1st number: 75/84, 2nd number: 2 6/7
75/84 - 20/7 is -55/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 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 7 × 12 = 84,
20/7 = 20 × 12/7 × 12 = 240/84 - Subtract the two like fractions:
75/84 - 240/84 = 75 - 240/84 = -165/84 - After reducing the fraction, the answer is -55/28
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