Add 4/21 and 18/5
1st number: 4/21, 2nd number: 3 3/5
4/21 + 18/5 is 398/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
4/21 = 4 × 5/21 × 5 = 20/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
18/5 = 18 × 21/5 × 21 = 378/105 - Add the two like fractions:
20/105 + 378/105 = 20 + 378/105 = 398/105 - So, 4/21 + 18/5 = 398/105
In mixed form: 383/105
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