What is the fraction equivalent of -3.4?

Triangle knm is what is true about the sides of knm

Can someone plz me understand how to do these. plz, show work. in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]

Which fraction represents the ratio 35 : 42 in simplest form