Add 81/2 and 10/21
1st number: 40 1/2, 2nd number: 10/21
81/2 + 10/21 is 1721/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
81/2 = 81 × 21/2 × 21 = 1701/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
10/21 = 10 × 2/21 × 2 = 20/42 - Add the two like fractions:
1701/42 + 20/42 = 1701 + 20/42 = 1721/42 - So, 81/2 + 10/21 = 1721/42
In mixed form: 4041/42
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