Subtract 18/30 from 81/12
1st number: 6 9/12, 2nd number: 18/30
81/12 - 18/30 is 123/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
18/30 = 18 × 2/30 × 2 = 36/60 - Subtract the two like fractions:
405/60 - 36/60 = 405 - 36/60 = 369/60 - After reducing the fraction, the answer is 123/20
- In mixed form: 63/20
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