Solutions by everydaycalculation.com

1^{st} number: 1 3/21, 2^{nd} number: 4 18/20

2421 + 9820 is 42370.

- 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,

2421 = 24 × 2021 × 20 = 480420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,

9820 = 98 × 2120 × 21 = 2058420 - Add the two like fractions:

480420 + 2058420 = 480 + 2058420 = 2538420 - 2538/420 simplified gives 42370
- So, 24/21 + 98/20 = 423/70

In mixed form: 6370

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