Solutions by everydaycalculation.com

1^{st} number: 21/42, 2^{nd} number: 1 5/20

2142 + 2520 is 74.

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

LCM of 42 and 20 is**420**

Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,

2142 = 21 × 1042 × 10 = 210420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,

2520 = 25 × 2120 × 21 = 525420 - Add the two like fractions:

210420 + 525420 = 210 + 525420 = 735420 - 735/420 simplified gives 74
- So, 21/42 + 25/20 = 7/4

In mixed form: 134

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