Add 10/42 and 20/18, Solve 10/42 + 1 2/18 as a fraction

Add 10/42 and 20/18

1^st number: 10/42, 2^nd number: 1 2/18

10/42 + 20/18 is 85/63.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 42 × 3 = 126,
10/42 = 10 × 3/42 × 3 = 30/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126
Add the two like fractions:
30/126 + 140/126 = 30 + 140/126 = 170/126
170/126 simplified gives 85/63
So, 10/42 + 20/18 = 85/63
In mixed form: 122/63

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