Add 45/42 and 15/18, Solve 1 3/42 + 15/18 as a fraction

Add 45/42 and 15/18

1^st number: 1 3/42, 2^nd number: 15/18

45/42 + 15/18 is 40/21.

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,
45/42 = 45 × 3/42 × 3 = 135/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126
Add the two like fractions:
135/126 + 105/126 = 135 + 105/126 = 240/126
240/126 simplified gives 40/21
So, 45/42 + 15/18 = 40/21
In mixed form: 119/21

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