Add 2/21 and 30/20, Solve 2/21 + 1 10/20 as a fraction

Add 2/21 and 30/20

1^st number: 2/21, 2^nd number: 1 10/20

2/21 + 30/20 is 67/42.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 21 × 20 = 420,
2/21 = 2 × 20/21 × 20 = 40/420
Likewise, for the 2nd fraction, since 20 × 21 = 420,
30/20 = 30 × 21/20 × 21 = 630/420
Add the two like fractions:
40/420 + 630/420 = 40 + 630/420 = 670/420
670/420 simplified gives 67/42
So, 2/21 + 30/20 = 67/42
In mixed form: 125/42

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