Question

a resposta desta operação esa correta??

Answer 1

o certo seria fazer assim

0,277...=x
2,777...=10x
27,777...=100x
25=90x
x=25/90
x=5/18

Answer 2

x⇒0,277...

10x=2,777

100x=27,77

100x-10x=27,77 -2,77

90x=25,00

90x=25

x=25/90

simplificando

x=5/18