Add 20/42 and 25/8, Solve 20/42 + 3 1/8 as a fraction

Add 20/42 and 25/8

1^st number: 20/42, 2^nd number: 3 1/8

20/42 + 25/8 is 605/168.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168

Next, find the equivalent fraction of both fractional numbers with denominator 168
For the 1st fraction, since 42 × 4 = 168,
20/42 = 20 × 4/42 × 4 = 80/168
Likewise, for the 2nd fraction, since 8 × 21 = 168,
25/8 = 25 × 21/8 × 21 = 525/168
Add the two like fractions:
80/168 + 525/168 = 80 + 525/168 = 605/168
So, 20/42 + 25/8 = 605/168
In mixed form: 3101/168

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