Chunguang TV Factory produced 250 TVs in September, 50 more than in August. What percentage of the increase in September?
春光电视机厂九月份生产电视机250台，比八月份多生产50台，九月份增产几分之几？
<gadget id="calculator">250 - 50</gadget>
<output>200</output>

<gadget id="calculator">50 / 200</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>