The total sales volume of a shopping mall in February was 1.7442 million yuan, and the total sales volume in January was 1.53 million yuan. By what percentage did total sales increase in February over January?
某商场二月份的销售总额是174.42万元，一月份销售总额是153万元．二月份比一月份销售总额增加了百分之几？
<gadget id="calculator">174.42 - 153</gadget>
<output>21.42</output>

<gadget id="calculator">21.42 / 153</gadget>
<output>0.14</output>

<result>0.14</result>