Subtract 21/6 from 42/15
1st number: 2 12/15, 2nd number: 3 3/6
42/15 - 21/6 is -7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 6 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
42/15 = 42 × 2/15 × 2 = 84/30 - Likewise, for the 2nd fraction, since 6 × 5 = 30,
21/6 = 21 × 5/6 × 5 = 105/30 - Subtract the two like fractions:
84/30 - 105/30 = 84 - 105/30 = -21/30 - After reducing the fraction, the answer is -7/10
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