Answers

Add 54/80 and 45/12

1^st number: 54/80, 2^nd number: 3 9/12

54/80 + 45/12 is 177/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 12 is 240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 240
2. For the 1st fraction, since 80 × 3 = 240,
   54/80 = 54 × 3/80 × 3 = 162/240
3. Likewise, for the 2nd fraction, since 12 × 20 = 240,
   45/12 = 45 × 20/12 × 20 = 900/240
4. Add the two like fractions:
   162/240 + 900/240 = 162 + 900/240 = 1062/240
5. 1062/240 simplified gives 177/40
6. So, 54/80 + 45/12 = 177/40
   In mixed form: 417/40

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