Answers

Add 70/45 and 90/80

1^st number: 1 25/45, 2^nd number: 1 10/80

70/45 + 90/80 is 193/72.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 45 × 16 = 720,
   70/45 = 70 × 16/45 × 16 = 1120/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   90/80 = 90 × 9/80 × 9 = 810/720
4. Add the two like fractions:
   1120/720 + 810/720 = 1120 + 810/720 = 1930/720
5. 1930/720 simplified gives 193/72
6. So, 70/45 + 90/80 = 193/72
   In mixed form: 249/72

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