Subtract 9/20 from 81/15
1st number: 5 6/15, 2nd number: 9/20
81/15 - 9/20 is 99/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
81/15 = 81 × 4/15 × 4 = 324/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
9/20 = 9 × 3/20 × 3 = 27/60 - Subtract the two like fractions:
324/60 - 27/60 = 324 - 27/60 = 297/60 - After reducing the fraction, the answer is 99/20
- In mixed form: 419/20
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