Add 81/21 and 20/6
1st number: 3 18/21, 2nd number: 3 2/6
81/21 + 20/6 is 151/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
81/21 = 81 × 2/21 × 2 = 162/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
20/6 = 20 × 7/6 × 7 = 140/42 - Add the two like fractions:
162/42 + 140/42 = 162 + 140/42 = 302/42 - 302/42 simplified gives 151/21
- So, 81/21 + 20/6 = 151/21
In mixed form: 74/21
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