Parenthesis Issue on Formula

ifElse(
greaterThan($pr_total_paid_c, multiply($pr_payment_gross_value_c,.45)
	,"0",
)
ifElse(
subtract(multiply($pr_payment_gross_value_c,.45)),
$pr_10_percentage_suggested_c,
$pr_total_paid_c)

Please tell me where i have gone wrong with this formula - Im not sure why it is not working, i think i just have my brackets misplaced!

I am trying to do 

If Total Paid is more than 45% Gross Value put "0" 

otherwise, workout 45% gross value minus 10% suggested field value minus total paid

Any help is greatly appreciated!