`E = [ ( 2/193 - 3/386 ) . 193/17 + 33/34 ] : [ ( 7/2001 + 11/4002 ) . 2001/25 + 9/2 ]`
`E = [ ( 4/386 - 3/386 ) . 193/17 + 33/34 ] : [ ( 14/4002 + 11/4002 ) . 2001/25 + 9/2 ]`
`E = [ 1/386 . 193/17 + 33/34 ] : [ 25/4002 . 2001/25 + 9/2 ]`
`E = [ 1/34 + 33/34 ] : [ 1/2 + 9/2 ]`
`E = 1 : 5`
`E = 1/5`
Vậy `, E = 1/5 .`