Answers

Add 15/80 and 54/40

1^st number: 15/80, 2^nd number: 1 14/40

15/80 + 54/40 is 123/80.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 40 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 80 × 1 = 80,
   15/80 = 15 × 1/80 × 1 = 15/80
3. Likewise, for the 2nd fraction, since 40 × 2 = 80,
   54/40 = 54 × 2/40 × 2 = 108/80
4. Add the two like fractions:
   15/80 + 108/80 = 15 + 108/80 = 123/80
5. So, 15/80 + 54/40 = 123/80
   In mixed form: 143/80

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