Subtract 1/20 from 81/12
1st number: 6 9/12, 2nd number: 1/20
81/12 - 1/20 is 67/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 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 20 × 3 = 60,
1/20 = 1 × 3/20 × 3 = 3/60 - Subtract the two like fractions:
405/60 - 3/60 = 405 - 3/60 = 402/60 - After reducing the fraction, the answer is 67/10
- In mixed form: 67/10
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