Add 81/84 and 4/21
81/84 + 4/21 is 97/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
81/84 = 81 × 1/84 × 1 = 81/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
4/21 = 4 × 4/21 × 4 = 16/84 - Add the two like fractions:
81/84 + 16/84 = 81 + 16/84 = 97/84 - So, 81/84 + 4/21 = 97/84
In mixed form: 113/84
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