Add 81/84 and 2/5
81/84 + 2/5 is 191/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 5 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Likewise, for the 2nd fraction, since 5 × 84 = 420,
2/5 = 2 × 84/5 × 84 = 168/420 - Add the two like fractions:
405/420 + 168/420 = 405 + 168/420 = 573/420 - 573/420 simplified gives 191/140
- So, 81/84 + 2/5 = 191/140
In mixed form: 151/140
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