Add 3/21 and 45/42, Solve 3/21 + 1 3/42 as a fraction

Add 3/21 and 45/42

1^st number: 3/21, 2^nd number: 1 3/42

3/21 + 45/42 is 17/14.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42
Likewise, for the 2nd fraction, since 42 × 1 = 42,
45/42 = 45 × 1/42 × 1 = 45/42
Add the two like fractions:
6/42 + 45/42 = 6 + 45/42 = 51/42
51/42 simplified gives 17/14
So, 3/21 + 45/42 = 17/14
In mixed form: 13/14

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