Add 6/42 and 75/20, Solve 6/42 + 3 15/20 as a fraction

Add 6/42 and 75/20

1^st number: 6/42, 2^nd number: 3 15/20

6/42 + 75/20 is 109/28.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 42 × 10 = 420,
6/42 = 6 × 10/42 × 10 = 60/420
Likewise, for the 2nd fraction, since 20 × 21 = 420,
75/20 = 75 × 21/20 × 21 = 1575/420
Add the two like fractions:
60/420 + 1575/420 = 60 + 1575/420 = 1635/420
1635/420 simplified gives 109/28
So, 6/42 + 75/20 = 109/28
In mixed form: 325/28

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