Answers

Add 25/28 and 42/20

1^st number: 25/28, 2^nd number: 2 2/20

25/28 + 42/20 is 419/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 28 × 5 = 140,
   25/28 = 25 × 5/28 × 5 = 125/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   42/20 = 42 × 7/20 × 7 = 294/140
4. Add the two like fractions:
   125/140 + 294/140 = 125 + 294/140 = 419/140
5. So, 25/28 + 42/20 = 419/140
   In mixed form: 2139/140

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