Answers

Add 25/21 and 2/20

1^st number: 1 4/21, 2^nd number: 2/20

25/21 + 2/20 is 271/210.

Steps for adding fractions

1. 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
2. For the 1st fraction, since 21 × 20 = 420,
   25/21 = 25 × 20/21 × 20 = 500/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   2/20 = 2 × 21/20 × 21 = 42/420
4. Add the two like fractions:
   500/420 + 42/420 = 500 + 42/420 = 542/420
5. 542/420 simplified gives 271/210
6. So, 25/21 + 2/20 = 271/210
   In mixed form: 161/210

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