Answer :
remember that % means out of 100 so 8.25% times 199.99 means 0.0825 times 199.99.
you can estimate by rounding 199.99 up to 200 and times 200 with 0.0825 and get 16.5
you can estimate by rounding 199.99 up to 200 and times 200 with 0.0825 and get 16.5