Subtract 12/15 from 21/6
1st number: 3 3/6, 2nd number: 12/15
21/6 - 12/15 is 27/10.
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,
12/15 = 12 × 2/15 × 2 = 24/30 - Subtract the two like fractions:
105/30 - 24/30 = 105 - 24/30 = 81/30 - After reducing the fraction, the answer is 27/10
- In mixed form: 27/10
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