Question 1206700

let unknown be {{{x}}}

1).

{{{ x* 0.05 = 0.04}}}

{{{x=0.04/0.05}}}

{{{x=0.8}}}

so,{{{ 0.8* 0.05 = 0.04}}}



2). 

{{{0.05 *x = 0.02}}}

{{{x=0.02/0.05}}}

{{{x=0.4}}}

=> {{{0.05 *0.4 = 0.02}}}


3). 

{{{x* 0.08 = 0.04}}}

{{{x=0.04/0.08}}}

{{{x=0.5}}}

=>{{{0.5* 0.08 = 0.04}}}