Add 8/21 and 20/12
1st number: 8/21, 2nd number: 1 8/12
8/21 + 20/12 is 43/21.
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,
8/21 = 8 × 4/21 × 4 = 32/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
20/12 = 20 × 7/12 × 7 = 140/84 - Add the two like fractions:
32/84 + 140/84 = 32 + 140/84 = 172/84 - 172/84 simplified gives 43/21
- So, 8/21 + 20/12 = 43/21
In mixed form: 21/21
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