Answers

Add 90/21 and 96/80

1^st number: 4 6/21, 2^nd number: 1 16/80

90/21 + 96/80 is 192/35.

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,
   90/21 = 90 × 80/21 × 80 = 7200/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   96/80 = 96 × 21/80 × 21 = 2016/1680
4. Add the two like fractions:
   7200/1680 + 2016/1680 = 7200 + 2016/1680 = 9216/1680
5. 9216/1680 simplified gives 192/35
6. So, 90/21 + 96/80 = 192/35
   In mixed form: 517/35

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