Answers

Add 20/21 and 60/40

1^st number: 20/21, 2^nd number: 1 20/40

20/21 + 60/40 is 103/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 21 × 40 = 840,
   20/21 = 20 × 40/21 × 40 = 800/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   60/40 = 60 × 21/40 × 21 = 1260/840
4. Add the two like fractions:
   800/840 + 1260/840 = 800 + 1260/840 = 2060/840
5. 2060/840 simplified gives 103/42
6. So, 20/21 + 60/40 = 103/42
   In mixed form: 219/42

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