Add 81/5 and 45/12
1st number: 16 1/5, 2nd number: 3 9/12
81/5 + 45/12 is 399/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 5 × 12 = 60,
81/5 = 81 × 12/5 × 12 = 972/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Add the two like fractions:
972/60 + 225/60 = 972 + 225/60 = 1197/60 - 1197/60 simplified gives 399/20
- So, 81/5 + 45/12 = 399/20
In mixed form: 1919/20
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