Add 80/30 and 21/63, Solve 2 20/30 + 21/63 as a fraction

Add 80/30 and 21/63

1^st number: 2 20/30, 2^nd number: 21/63

80/30 + 21/63 is 3/1.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 30 × 21 = 630,
80/30 = 80 × 21/30 × 21 = 1680/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
21/63 = 21 × 10/63 × 10 = 210/630
Add the two like fractions:
1680/630 + 210/630 = 1680 + 210/630 = 1890/630
1890/630 simplified gives 3/1
So, 80/30 + 21/63 = 3/1

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