Question

Responder a expressão [(2-5/4) . 2/3 + 2/5] : (1+4/5)

Answer 1

[(2 - 5/4 ) . 2/3 + 2/5] : ( 1 + 4/5 ) =
[(8/4 - 5/4 ) . 2/3  + 2/5 ] : ( 5/5 + 4/5 )   =
[4/4 . 2/3 + 2/5 ] : 9/5
[ 1 . 2/3 + 2/5 ] : 9/5
[ 2/3 + 2/5 ] : 9/5
[10/15 + 6/15 ] : 9/5
16/15 : 9/5 = 
16/15 x 5/9 = 80/135 simplifica por 5 =  16/27