Answers

Add 42/21 and 16/80

1^st number: 2 0/21, 2^nd number: 16/80

42/21 + 16/80 is 11/5.

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,
   42/21 = 42 × 80/21 × 80 = 3360/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   16/80 = 16 × 21/80 × 21 = 336/1680
4. Add the two like fractions:
   3360/1680 + 336/1680 = 3360 + 336/1680 = 3696/1680
5. 3696/1680 simplified gives 11/5
6. So, 42/21 + 16/80 = 11/5
   In mixed form: 21/5

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