Add 21/2 and 20/5
1st number: 10 1/2, 2nd number: 4 0/5
21/2 + 20/5 is 29/2.
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,
20/5 = 20 × 2/5 × 2 = 40/10 - Add the two like fractions:
105/10 + 40/10 = 105 + 40/10 = 145/10 - 145/10 simplified gives 29/2
- So, 21/2 + 20/5 = 29/2
In mixed form: 141/2
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