In a survey exercise, the scoring rate of the whole class on Youdao questions is only 75%, and the scoring rate of girls is 90%. It is known that the ratio of girls to boys is 2:3. Please calculate the score rate of boys?
在一次调查练习中，有道题目全班得分率只有75%，其中女生的得分率是90%，已知女生和男生人数之比为2：3，请你算出男生的得分率是多少？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">50 * 10 * (3/4)</gadget>
<output>375</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">50 * (2/5)</gadget>
<output>20</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">20 * 10 * (9/10)</gadget>
<output>180</output>

<gadget id="calculator">375 - 180</gadget>
<output>195</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">50 * (3/5)</gadget>
<output>30</output>

<gadget id="calculator">30 * 10</gadget>
<output>300</output>

<gadget id="calculator">195 / 300</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>