Subtract 84/15 from 21/6
1st number: 3 3/6, 2nd number: 5 9/15
21/6 - 84/15 is -21/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 6 × 5 = 30,
21/6 = 21 × 5/6 × 5 = 105/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
84/15 = 84 × 2/15 × 2 = 168/30 - Subtract the two like fractions:
105/30 - 168/30 = 105 - 168/30 = -63/30 - After reducing the fraction, the answer is -21/10
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