Add 21/6 and 81/42
1st number: 3 3/6, 2nd number: 1 39/42
21/6 + 81/42 is 38/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
81/42 = 81 × 1/42 × 1 = 81/42 - Add the two like fractions:
147/42 + 81/42 = 147 + 81/42 = 228/42 - 228/42 simplified gives 38/7
- So, 21/6 + 81/42 = 38/7
In mixed form: 53/7
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