Add 20/2 and 45/21, Solve 10 0/2 + 2 3/21 as a fraction

Add 20/2 and 45/21

1^st number: 10 0/2, 2^nd number: 2 3/21

20/2 + 45/21 is 85/7.

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,
20/2 = 20 × 21/2 × 21 = 420/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
45/21 = 45 × 2/21 × 2 = 90/42
Add the two like fractions:
420/42 + 90/42 = 420 + 90/42 = 510/42
510/42 simplified gives 85/7
So, 20/2 + 45/21 = 85/7
In mixed form: 121/7

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