Answers

Add 80/40 and 98/21

1^st number: 2 0/40, 2^nd number: 4 14/21

80/40 + 98/21 is 20/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 21 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 40 × 21 = 840,
   80/40 = 80 × 21/40 × 21 = 1680/840
3. Likewise, for the 2nd fraction, since 21 × 40 = 840,
   98/21 = 98 × 40/21 × 40 = 3920/840
4. Add the two like fractions:
   1680/840 + 3920/840 = 1680 + 3920/840 = 5600/840
5. 5600/840 simplified gives 20/3
6. So, 80/40 + 98/21 = 20/3
   In mixed form: 62/3

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