Subtract 21/15 from 81/9
1st number: 9 0/9, 2nd number: 1 6/15
81/9 - 21/15 is 38/5.
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,
81/9 = 81 × 5/9 × 5 = 405/45 - Likewise, for the 2nd fraction, since 15 × 3 = 45,
21/15 = 21 × 3/15 × 3 = 63/45 - Subtract the two like fractions:
405/45 - 63/45 = 405 - 63/45 = 342/45 - After reducing the fraction, the answer is 38/5
- In mixed form: 73/5
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