Add 12/21 and 20/42
12/21 + 20/42 is 22/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
12/21 = 12 × 2/21 × 2 = 24/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Add the two like fractions:
24/42 + 20/42 = 24 + 20/42 = 44/42 - 44/42 simplified gives 22/21
- So, 12/21 + 20/42 = 22/21
In mixed form: 11/21
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