Question

calcular
0,777...-1/2=

Answer 1

0,777 . . .  - 1/2

(1)x = 0,777 . . .
(2)10x = 7,777 . . .

10 x - x = 7
9 x = 7
x = 7/9

7/9 - 1/2 = 5/18