Add 21/4 and 81/84
1st number: 5 1/4, 2nd number: 81/84
21/4 + 81/84 is 87/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
21/4 = 21 × 21/4 × 21 = 441/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
81/84 = 81 × 1/84 × 1 = 81/84 - Add the two like fractions:
441/84 + 81/84 = 441 + 81/84 = 522/84 - 522/84 simplified gives 87/14
- So, 21/4 + 81/84 = 87/14
In mixed form: 63/14
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