Question

efetue as substituições
7/9-5/9

9/5-2/5

2/3-1/3

8/3-2/3

5/6-1/6

5/5-2/5

5/7-2/7

Answer 1

7/9-5/9 = 2/9

9/5-2/5 = 7/5

2/3-1/3 = 1/3

8/3-2/3 = 6/3

5/6-1/6 = 4/6

5/5-2/5 = 3/5

5/7-2/7 = 3/7

Um abraço.