The choir originally had 325 students. If the number of boys increases by 25 and the number of girls decreases by 5%, the choir will have 341 students. How many boys were there in the chorus?
合唱团原有325个学生，如果男生增加25人，女生减少5%，合唱团将会有341个学生．合唱团原有男生多少人．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">9 / (1/20)</gadget>
<output>180</output>

<gadget id="calculator">325 - 180</gadget>
<output>145</output>

<result>145</result>