Subtract 84/21 from 5/2
1st number: 2 1/2, 2nd number: 4 0/21
5/2 - 84/21 is -3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
5/2 = 5 × 21/2 × 21 = 105/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
84/21 = 84 × 2/21 × 2 = 168/42 - Subtract the two like fractions:
105/42 - 168/42 = 105 - 168/42 = -63/42 - After reducing the fraction, the answer is -3/2
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