Add 42/21 and 81/6
1st number: 2 0/21, 2nd number: 13 3/6
42/21 + 81/6 is 31/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
42/21 = 42 × 2/21 × 2 = 84/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
81/6 = 81 × 7/6 × 7 = 567/42 - Add the two like fractions:
84/42 + 567/42 = 84 + 567/42 = 651/42 - 651/42 simplified gives 31/2
- So, 42/21 + 81/6 = 31/2
In mixed form: 151/2
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