Answers

Add 20/45 and 90/80

1^st number: 20/45, 2^nd number: 1 10/80

20/45 + 90/80 is 113/72.

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,
   20/45 = 20 × 16/45 × 16 = 320/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   90/80 = 90 × 9/80 × 9 = 810/720
4. Add the two like fractions:
   320/720 + 810/720 = 320 + 810/720 = 1130/720
5. 1130/720 simplified gives 113/72
6. So, 20/45 + 90/80 = 113/72
   In mixed form: 141/72

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