There are two ways you could do it, one involves a calculator and one doesn't.
Calculator:
You would just do 4500 × 1.7 = $7650
Non-calculator:
First you'd divide 4500 by 10 to get 10%, which is 450. Then you'd multiply 450 by 7 to get 3150. Now you just add 4500 and 3150 to get $7650
I hope this helps!