Answers

Add 50/21 and 70/80

1^st number: 2 8/21, 2^nd number: 70/80

50/21 + 70/80 is 547/168.

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,
   50/21 = 50 × 80/21 × 80 = 4000/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   70/80 = 70 × 21/80 × 21 = 1470/1680
4. Add the two like fractions:
   4000/1680 + 1470/1680 = 4000 + 1470/1680 = 5470/1680
5. 5470/1680 simplified gives 547/168
6. So, 50/21 + 70/80 = 547/168
   In mixed form: 343/168

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