The ratio of defective products to qualified products produced by a worker in one day is 1:49, what is the qualified rate of his products?
某工人一天生产的次品与合格品的比是1：49，其产品的合格率是多少．
<gadget id="calculator">1 + 49</gadget>
<output>50</output>

<gadget id="calculator">49 / 50</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>