Add 84/42 and 12/21
1st number: 2 0/42, 2nd number: 12/21
84/42 + 12/21 is 18/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
84/42 = 84 × 1/42 × 1 = 84/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
12/21 = 12 × 2/21 × 2 = 24/42 - Add the two like fractions:
84/42 + 24/42 = 84 + 24/42 = 108/42 - 108/42 simplified gives 18/7
- So, 84/42 + 12/21 = 18/7
In mixed form: 24/7
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