Answers

Add 54/9 and 70/80

1^st number: 6 0/9, 2^nd number: 70/80

54/9 + 70/80 is 55/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 9 × 80 = 720,
   54/9 = 54 × 80/9 × 80 = 4320/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   70/80 = 70 × 9/80 × 9 = 630/720
4. Add the two like fractions:
   4320/720 + 630/720 = 4320 + 630/720 = 4950/720
5. 4950/720 simplified gives 55/8
6. So, 54/9 + 70/80 = 55/8
   In mixed form: 67/8

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