Add 72/45 and 80/42, Solve 1 27/45 + 1 38/42 as a fraction

Add 72/45 and 80/42

1^st number: 1 27/45, 2^nd number: 1 38/42

72/45 + 80/42 is 368/105.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 45 × 14 = 630,
72/45 = 72 × 14/45 × 14 = 1008/630
Likewise, for the 2nd fraction, since 42 × 15 = 630,
80/42 = 80 × 15/42 × 15 = 1200/630
Add the two like fractions:
1008/630 + 1200/630 = 1008 + 1200/630 = 2208/630
2208/630 simplified gives 368/105
So, 72/45 + 80/42 = 368/105
In mixed form: 353/105

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