Add 18/5 and 81/84
1st number: 3 3/5, 2nd number: 81/84
18/5 + 81/84 is 639/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 5 × 84 = 420,
18/5 = 18 × 84/5 × 84 = 1512/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Add the two like fractions:
1512/420 + 405/420 = 1512 + 405/420 = 1917/420 - 1917/420 simplified gives 639/140
- So, 18/5 + 81/84 = 639/140
In mixed form: 479/140
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