\(Method\ 1:\\\\\dfrac{72}{480}\cdot100\%=\dfrac{3}{20}\cdot100\%=\dfrac{300}{20}\%=15\%\\--------------------\\Method\ 2:\\\\480\ -\ 100\%\\72\ \ \ -\ p\%\\\\cross\ multiply\\\\480p=72\cdot100\\480p=7200\ \ \ |divide\ both\ sides\ by\ 480\\p=15\ (\%)\\--------------------\\Method\ 3:\\\\480x=72\ \ \ |divide\ both\ sides\ by\ 480\\\\x=\dfrac{72}{480}\\\\x=\dfrac{3}{20}\\\\\dfrac{3}{20}\cdot100\%=15\%\)
