Subtract 20/3 from 21/84
1st number: 21/84, 2nd number: 6 2/3
21/84 - 20/3 is -77/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 3 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Likewise, for the 2nd fraction, since 3 × 28 = 84,
20/3 = 20 × 28/3 × 28 = 560/84 - Subtract the two like fractions:
21/84 - 560/84 = 21 - 560/84 = -539/84 - After reducing the fraction, the answer is -77/12
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