Solutions by everydaycalculation.com

1^{st} number: 4 2/10, 2^{nd} number: 3 9/21

4210 + 7221 is 26735.

- Find the least common denominator or LCM of the two denominators:

LCM of 10 and 21 is**210**

Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,

4210 = 42 × 2110 × 21 = 882210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,

7221 = 72 × 1021 × 10 = 720210 - Add the two like fractions:

882210 + 720210 = 882 + 720210 = 1602210 - 1602/210 simplified gives 26735
- So, 42/10 + 72/21 = 267/35

In mixed form: 72235

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