Add 20/21 and 84/12
1st number: 20/21, 2nd number: 7 0/12
20/21 + 84/12 is 167/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
20/21 = 20 × 4/21 × 4 = 80/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
84/12 = 84 × 7/12 × 7 = 588/84 - Add the two like fractions:
80/84 + 588/84 = 80 + 588/84 = 668/84 - 668/84 simplified gives 167/21
- So, 20/21 + 84/12 = 167/21
In mixed form: 720/21
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