Answers

Add 30/21 and 80/60

1^st number: 1 9/21, 2^nd number: 1 20/60

30/21 + 80/60 is 58/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 21 × 20 = 420,
   30/21 = 30 × 20/21 × 20 = 600/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   80/60 = 80 × 7/60 × 7 = 560/420
4. Add the two like fractions:
   600/420 + 560/420 = 600 + 560/420 = 1160/420
5. 1160/420 simplified gives 58/21
6. So, 30/21 + 80/60 = 58/21
   In mixed form: 216/21

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