Clea estimates that a glass contains 250.55ml of water the actual amount of water in the glass is 279.48ml to the nearest tenth of a percent what is the percent error in clea estimate

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]