Add 7/84 and 81/42
1st number: 7/84, 2nd number: 1 39/42
7/84 + 81/42 is 169/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
7/84 = 7 × 1/84 × 1 = 7/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
81/42 = 81 × 2/42 × 2 = 162/84 - Add the two like fractions:
7/84 + 162/84 = 7 + 162/84 = 169/84 - So, 7/84 + 81/42 = 169/84
In mixed form: 21/84
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