Add 42/21 and 81/5
1st number: 2 0/21, 2nd number: 16 1/5
42/21 + 81/5 is 91/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
42/21 = 42 × 5/21 × 5 = 210/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
81/5 = 81 × 21/5 × 21 = 1701/105 - Add the two like fractions:
210/105 + 1701/105 = 210 + 1701/105 = 1911/105 - 1911/105 simplified gives 91/5
- So, 42/21 + 81/5 = 91/5
In mixed form: 181/5
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