What percent of 6 is 4 ?

Let the percentage be x
[tex]\\ \sf\longmapsto x\%\:of 6=4[/tex]
[tex]\\ \sf\longmapsto \dfrac{6x}{100}=4[/tex]
[tex]\\ \sf\longmapsto 6x=400[/tex]
[tex]\\ \sf\longmapsto x=400/6[/tex]
[tex]\\ \sf\longmapsto x=66.67\%[/tex]