Answers

Add 81/30 and 63/80

1^st number: 2 21/30, 2^nd number: 63/80

81/30 + 63/80 is 279/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 80 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 30 × 8 = 240,
   81/30 = 81 × 8/30 × 8 = 648/240
3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
   63/80 = 63 × 3/80 × 3 = 189/240
4. Add the two like fractions:
   648/240 + 189/240 = 648 + 189/240 = 837/240
5. 837/240 simplified gives 279/80
6. So, 81/30 + 63/80 = 279/80
   In mixed form: 339/80

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