Add 21/2 and 42/5
1st number: 10 1/2, 2nd number: 8 2/5
21/2 + 42/5 is 189/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 5 is 10
Next, find the equivalent fraction of both fractional numbers with denominator 10 - For the 1st fraction, since 2 × 5 = 10,
21/2 = 21 × 5/2 × 5 = 105/10 - Likewise, for the 2nd fraction, since 5 × 2 = 10,
42/5 = 42 × 2/5 × 2 = 84/10 - Add the two like fractions:
105/10 + 84/10 = 105 + 84/10 = 189/10 - So, 21/2 + 42/5 = 189/10
In mixed form: 189/10
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