The current price of a product is 45 yuan, which is 5 yuan lower than the original price. What is the correct formula for the reduction by a few percent?
一种产品现价45元，比原价降低了5元，求降低了百分之几的正确列式是多少
<gadget id="calculator">45 + 5</gadget>
<output>50</output>

<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>