Ganjiang Machine Tool Factory produced 650 machine tools in May, 150 more than in April. What percentage increase in production in May?
赣江机床厂五月份生产机床650台，比四月份多生产机床150台．五月份增产百分之几？
<gadget id="calculator">650 - 150</gadget>
<output>500</output>

<gadget id="calculator">150 / 500</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>