Answers

Add 84/28 and 20/80

1^st number: 3 0/28, 2^nd number: 20/80

84/28 + 20/80 is 13/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 28 × 20 = 560,
   84/28 = 84 × 20/28 × 20 = 1680/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   20/80 = 20 × 7/80 × 7 = 140/560
4. Add the two like fractions:
   1680/560 + 140/560 = 1680 + 140/560 = 1820/560
5. 1820/560 simplified gives 13/4
6. So, 84/28 + 20/80 = 13/4
   In mixed form: 31/4

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