Answers

Add 15/56 and 90/80

1^st number: 15/56, 2^nd number: 1 10/80

15/56 + 90/80 is 39/28.

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,
   15/56 = 15 × 10/56 × 10 = 150/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   90/80 = 90 × 7/80 × 7 = 630/560
4. Add the two like fractions:
   150/560 + 630/560 = 150 + 630/560 = 780/560
5. 780/560 simplified gives 39/28
6. So, 15/56 + 90/80 = 39/28
   In mixed form: 111/28

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