Answers

Add 20/21 and 80/60

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

20/21 + 80/60 is 16/7.

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,
   20/21 = 20 × 20/21 × 20 = 400/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   80/60 = 80 × 7/60 × 7 = 560/420
4. Add the two like fractions:
   400/420 + 560/420 = 400 + 560/420 = 960/420
5. 960/420 simplified gives 16/7
6. So, 20/21 + 80/60 = 16/7
   In mixed form: 22/7

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