Add 42/10 and 21/4
1st number: 4 2/10, 2nd number: 5 1/4
42/10 + 21/4 is 189/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 10 × 2 = 20,
42/10 = 42 × 2/10 × 2 = 84/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
21/4 = 21 × 5/4 × 5 = 105/20 - Add the two like fractions:
84/20 + 105/20 = 84 + 105/20 = 189/20 - So, 42/10 + 21/4 = 189/20
In mixed form: 99/20
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