Solve for the unknown interest rate in each of the following (Enter rounded answers as directed, but do not use rounded numbers in intermediate calculations. Enter your answer as a percent rounded to 2 decimal places (e.g., 32.16)):

Present Value				Years			Interest Rate				Future Value
	$	720			7				%			$	1,391
		910			8				%				1,728
		15,500			19				%				142,332
		70,800			22				%				313,815

Present Value Years Interest Rate Future Value $ 720 910 15,500 70,800 % $1,391 1,728 142,332 313,815 8 0 0 19 0 0 0 0