Answers

Add 84/56 and 18/80

1^st number: 1 28/56, 2^nd number: 18/80

84/56 + 18/80 is 69/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 56 × 10 = 560,
   84/56 = 84 × 10/56 × 10 = 840/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   18/80 = 18 × 7/80 × 7 = 126/560
4. Add the two like fractions:
   840/560 + 126/560 = 840 + 126/560 = 966/560
5. 966/560 simplified gives 69/40
6. So, 84/56 + 18/80 = 69/40
   In mixed form: 129/40

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