A mathematical dictionary is priced at b yuan, and the profit is 25% of the cost. If the profit is increased to 35%, how much should the selling price be increased?
一本数学辞典售价b元，利润是成本的25%，如果把利润提高到35%，那么应提高售价多少元．
<gadget id="calculator">2 / 25</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>