Answers

Add 60/20 and 40/21

1^st number: 3 0/20, 2^nd number: 1 19/21

60/20 + 40/21 is 103/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 21 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   60/20 = 60 × 21/20 × 21 = 1260/420
3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
   40/21 = 40 × 20/21 × 20 = 800/420
4. Add the two like fractions:
   1260/420 + 800/420 = 1260 + 800/420 = 2060/420
5. 2060/420 simplified gives 103/21
6. So, 60/20 + 40/21 = 103/21
   In mixed form: 419/21

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