Answer:
$766.23
Explanation:
The amortization formula is appropriate for this. (Better, use a financial calculator or spreadsheet.)
A = P(r/12)/(1 -(1 +r/12)^-(12t))
where P is the amount borrowed (25,000), r is the annual rate (0.065), and t is the number of years (3).
Putting the given numbers into the formula, we have ...
A = $25,000(0.065/12)/(1 -(1 +0.065/12)^(-36))
A = $25,000(.00541667)/(1 -1.00541667^-36)
A = $25,000(0.00541667)/(0.1767322)
A = $766.23
The monthly payment is $766.23.
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Comment on tools
A graphing or scientific calculator is useful for these. Something like a TI-84, or any of the equivalents, will have financial calculations like this built in. There are also numerous apps available for phone or tablet that will do financial calculations.