Answers

Add 84/21 and 7/80

1^st number: 4 0/21, 2^nd number: 7/80

84/21 + 7/80 is 327/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 21 × 80 = 1680,
   84/21 = 84 × 80/21 × 80 = 6720/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   7/80 = 7 × 21/80 × 21 = 147/1680
4. Add the two like fractions:
   6720/1680 + 147/1680 = 6720 + 147/1680 = 6867/1680
5. 6867/1680 simplified gives 327/80
6. So, 84/21 + 7/80 = 327/80
   In mixed form: 47/80

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