Add 21/2 and 42/15
1st number: 10 1/2, 2nd number: 2 12/15
21/2 + 42/15 is 133/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
21/2 = 21 × 15/2 × 15 = 315/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
42/15 = 42 × 2/15 × 2 = 84/30 - Add the two like fractions:
315/30 + 84/30 = 315 + 84/30 = 399/30 - 399/30 simplified gives 133/10
- So, 21/2 + 42/15 = 133/10
In mixed form: 133/10
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