Subtract 27/21 from 45/84
1st number: 45/84, 2nd number: 1 6/21
45/84 - 27/21 is -3/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
45/84 = 45 × 1/84 × 1 = 45/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
27/21 = 27 × 4/21 × 4 = 108/84 - Subtract the two like fractions:
45/84 - 108/84 = 45 - 108/84 = -63/84 - After reducing the fraction, the answer is -3/4
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