Add 21/2 and 45/40, Solve 10 1/2 + 1 5/40 as a fraction

Add 21/2 and 45/40

1^st number: 10 1/2, 2^nd number: 1 5/40

21/2 + 45/40 is 93/8.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40

Next, find the equivalent fraction of both fractional numbers with denominator 40
For the 1st fraction, since 2 × 20 = 40,
21/2 = 21 × 20/2 × 20 = 420/40
Likewise, for the 2nd fraction, since 40 × 1 = 40,
45/40 = 45 × 1/40 × 1 = 45/40
Add the two like fractions:
420/40 + 45/40 = 420 + 45/40 = 465/40
465/40 simplified gives 93/8
So, 21/2 + 45/40 = 93/8
In mixed form: 115/8

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