Answers

Add 98/80 and 45/90

1^st number: 1 18/80, 2^nd number: 45/90

98/80 + 45/90 is 69/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 90 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   98/80 = 98 × 9/80 × 9 = 882/720
3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
   45/90 = 45 × 8/90 × 8 = 360/720
4. Add the two like fractions:
   882/720 + 360/720 = 882 + 360/720 = 1242/720
5. 1242/720 simplified gives 69/40
6. So, 98/80 + 45/90 = 69/40
   In mixed form: 129/40

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