Subtract 12/15 from 21/9
1st number: 2 3/9, 2nd number: 12/15
21/9 - 12/15 is 23/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 15 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 9 × 5 = 45,
21/9 = 21 × 5/9 × 5 = 105/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
12/15 = 12 × 3/15 × 3 = 36/45 - Subtract the two like fractions:
105/45 - 36/45 = 105 - 36/45 = 69/45 - After reducing the fraction, the answer is 23/15
- In mixed form: 18/15
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