please help me write an algebraic expression equation. then solve these percent problems.
A $150 leather jacket is going on sale for a 25% discount. How much will the jacket cost on sale?
Jim brought 3 CD's at a cost of $
14.99 each. What will he pay including 7% sales tax?\(p\%=\frac{p}{100}\\\\100\%-25\%=75\%=\frac{75}{100}=0.75\\\\0.75\times\$150=\$112.50\leftarrow answer\\=======================================\\100\%+7\%=107\%=\frac{107}{100}=1.07\\\\1.07\times3\times\$14.99\approx\$48.12\leftarrow answer\)