Answers

Add 56/21 and 28/20

1^st number: 2 14/21, 2^nd number: 1 8/20

56/21 + 28/20 is 61/15.

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,
   56/21 = 56 × 20/21 × 20 = 1120/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   28/20 = 28 × 21/20 × 21 = 588/420
4. Add the two like fractions:
   1120/420 + 588/420 = 1120 + 588/420 = 1708/420
5. 1708/420 simplified gives 61/15
6. So, 56/21 + 28/20 = 61/15
   In mixed form: 41/15

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