Add 81/2 and 15/42, Solve 40 1/2 + 15/42 as a fraction

Add 81/2 and 15/42

1^st number: 40 1/2, 2^nd number: 15/42

81/2 + 15/42 is 286/7.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 42 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 42 × 1 = 42,
15/42 = 15 × 1/42 × 1 = 15/42
Add the two like fractions:
1701/42 + 15/42 = 1701 + 15/42 = 1716/42
1716/42 simplified gives 286/7
So, 81/2 + 15/42 = 286/7
In mixed form: 406/7

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