Answers

Add 21/20 and 60/42

1^st number: 1 1/20, 2^nd number: 1 18/42

21/20 + 60/42 is 347/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 42 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 20 × 21 = 420,
   21/20 = 21 × 21/20 × 21 = 441/420
3. Likewise, for the 2nd fraction, since 42 × 10 = 420,
   60/42 = 60 × 10/42 × 10 = 600/420
4. Add the two like fractions:
   441/420 + 600/420 = 441 + 600/420 = 1041/420
5. 1041/420 simplified gives 347/140
6. So, 21/20 + 60/42 = 347/140
   In mixed form: 267/140

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