Solutions by everydaycalculation.com

1^{st} number: 25/42, 2^{nd} number: 3 5/10

2542 + 3510 is 8621.

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

LCM of 42 and 10 is**210** - For the 1st fraction, since 42 × 5 = 210,

2542 = 25 × 542 × 5 = 125210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,

3510 = 35 × 2110 × 21 = 735210 - Add the two fractions:

125210 + 735210 = 125 + 735210 = 860210 - 860/210 simplified gives 8621
- So, 25/42 + 35/10 = 86/21

In mixed form: 4221

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