Add 81/12 and 75/20
1st number: 6 9/12, 2nd number: 3 15/20
81/12 + 75/20 is 21/2.
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,
75/20 = 75 × 3/20 × 3 = 225/60 - Add the two like fractions:
405/60 + 225/60 = 405 + 225/60 = 630/60 - 630/60 simplified gives 21/2
- So, 81/12 + 75/20 = 21/2
In mixed form: 101/2
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