Answers

Add 70/90 and 90/80

1^st number: 70/90, 2^nd number: 1 10/80

70/90 + 90/80 is 137/72.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 80 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 90 × 8 = 720,
   70/90 = 70 × 8/90 × 8 = 560/720
3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
   90/80 = 90 × 9/80 × 9 = 810/720
4. Add the two like fractions:
   560/720 + 810/720 = 560 + 810/720 = 1370/720
5. 1370/720 simplified gives 137/72
6. So, 70/90 + 90/80 = 137/72
   In mixed form: 165/72

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