Add 7/21 and 84/42
1st number: 7/21, 2nd number: 2 0/42
7/21 + 84/42 is 7/3.
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,
7/21 = 7 × 2/21 × 2 = 14/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
84/42 = 84 × 1/42 × 1 = 84/42 - Add the two like fractions:
14/42 + 84/42 = 14 + 84/42 = 98/42 - 98/42 simplified gives 7/3
- So, 7/21 + 84/42 = 7/3
In mixed form: 21/3
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