Add 10/80 and 45/42, Solve 10/80 + 1 3/42 as a fraction

Add 10/80 and 45/42

1^st number: 10/80, 2^nd number: 1 3/42

10/80 + 45/42 is 67/56.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680

Next, find the equivalent fraction of both fractional numbers with denominator 1680
For the 1st fraction, since 80 × 21 = 1680,
10/80 = 10 × 21/80 × 21 = 210/1680
Likewise, for the 2nd fraction, since 42 × 40 = 1680,
45/42 = 45 × 40/42 × 40 = 1800/1680
Add the two like fractions:
210/1680 + 1800/1680 = 210 + 1800/1680 = 2010/1680
2010/1680 simplified gives 67/56
So, 10/80 + 45/42 = 67/56
In mixed form: 111/56

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