Question

A= 2/3-1,444... e B=0,7-0,777... determine A:B

Answer 1

A) 1,444 = 13/9  
2/3 - 13/9 = MMC 9
6/9 - 13/9 = -7/9
A = -7/9

B) 0,7 = 7/10
0,777 = 7/9
7/10 - 7/9 = MMC 90
63/90 - 70/90 = - 7/90
B = -7/90

A : B = -7/9 : - 7/90
A : B = -7/9 x -90/7
A : B = 630/63
A : B = 10