Add 84/63 and 90/80, Solve 1 21/63 + 1 10/80 as a fraction

Add 84/63 and 90/80

1^st number: 1 21/63, 2^nd number: 1 10/80

84/63 + 90/80 is 59/24.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 80 is 5040

Next, find the equivalent fraction of both fractional numbers with denominator 5040
For the 1st fraction, since 63 × 80 = 5040,
84/63 = 84 × 80/63 × 80 = 6720/5040
Likewise, for the 2nd fraction, since 80 × 63 = 5040,
90/80 = 90 × 63/80 × 63 = 5670/5040
Add the two like fractions:
6720/5040 + 5670/5040 = 6720 + 5670/5040 = 12390/5040
12390/5040 simplified gives 59/24
So, 84/63 + 90/80 = 59/24
In mixed form: 211/24

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