Add 81/45 and 54/42, Solve 1 36/45 + 1 12/42 as a fraction

Add 81/45 and 54/42

1^st number: 1 36/45, 2^nd number: 1 12/42

81/45 + 54/42 is 108/35.

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,
81/45 = 81 × 14/45 × 14 = 1134/630
Likewise, for the 2nd fraction, since 42 × 15 = 630,
54/42 = 54 × 15/42 × 15 = 810/630
Add the two like fractions:
1134/630 + 810/630 = 1134 + 810/630 = 1944/630
1944/630 simplified gives 108/35
So, 81/45 + 54/42 = 108/35
In mixed form: 33/35

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