Answers

Add 48/42 and 20/80

1^st number: 1 6/42, 2^nd number: 20/80

48/42 + 20/80 is 39/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 42 × 40 = 1680,
   48/42 = 48 × 40/42 × 40 = 1920/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   20/80 = 20 × 21/80 × 21 = 420/1680
4. Add the two like fractions:
   1920/1680 + 420/1680 = 1920 + 420/1680 = 2340/1680
5. 2340/1680 simplified gives 39/28
6. So, 48/42 + 20/80 = 39/28
   In mixed form: 111/28

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