Add 81/3 and 21/42
1st number: 27 0/3, 2nd number: 21/42
81/3 + 21/42 is 55/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
81/3 = 81 × 14/3 × 14 = 1134/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
21/42 = 21 × 1/42 × 1 = 21/42 - Add the two like fractions:
1134/42 + 21/42 = 1134 + 21/42 = 1155/42 - 1155/42 simplified gives 55/2
- So, 81/3 + 21/42 = 55/2
In mixed form: 271/2
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