Add 81/2 and 21/12
1st number: 40 1/2, 2nd number: 1 9/12
81/2 + 21/12 is 169/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 2 × 6 = 12,
81/2 = 81 × 6/2 × 6 = 486/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
21/12 = 21 × 1/12 × 1 = 21/12 - Add the two like fractions:
486/12 + 21/12 = 486 + 21/12 = 507/12 - 507/12 simplified gives 169/4
- So, 81/2 + 21/12 = 169/4
In mixed form: 421/4
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