Answers

Add 45/56 and 75/20

1^st number: 45/56, 2^nd number: 3 15/20

45/56 + 75/20 is 255/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 20 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 56 × 5 = 280,
   45/56 = 45 × 5/56 × 5 = 225/280
3. Likewise, for the 2nd fraction, since 20 × 14 = 280,
   75/20 = 75 × 14/20 × 14 = 1050/280
4. Add the two like fractions:
   225/280 + 1050/280 = 225 + 1050/280 = 1275/280
5. 1275/280 simplified gives 255/56
6. So, 45/56 + 75/20 = 255/56
   In mixed form: 431/56

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