The November turnover of a chain store was 345,000 yuan, an increase of 45,000 yuan compared with October. By what percentage did the turnover in November increase in October?
某连锁店十一月份营业额34.5万元，比十月份增加了4.5万元．十一月份营业额十月份增加了百分之几？
<gadget id="calculator">34.5 - 4.5</gadget>
<output>30</output>

<gadget id="calculator">4.5 / 30</gadget>
<output>0.15</output>

<result>0.15</result>