Add 81/12 and 72/20
1st number: 6 9/12, 2nd number: 3 12/20
81/12 + 72/20 is 207/20.
Steps for adding 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,
72/20 = 72 × 3/20 × 3 = 216/60 - Add the two like fractions:
405/60 + 216/60 = 405 + 216/60 = 621/60 - 621/60 simplified gives 207/20
- So, 81/12 + 72/20 = 207/20
In mixed form: 107/20
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