Add 20/3 and 42/21
1st number: 6 2/3, 2nd number: 2 0/21
20/3 + 42/21 is 26/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
20/3 = 20 × 7/3 × 7 = 140/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
42/21 = 42 × 1/21 × 1 = 42/21 - Add the two like fractions:
140/21 + 42/21 = 140 + 42/21 = 182/21 - 182/21 simplified gives 26/3
- So, 20/3 + 42/21 = 26/3
In mixed form: 82/3
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