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
	$	715			9				%			$	1,381
		905			6				%				1,718
		15,000			21				%				141,832
		70,300			18				%				312,815