There were 200 girls in Xinmin Primary School last year, and there were 80 more boys than girls. This year, the number of girls has increased (1/5) compared to last year, and it is 30 more than the number of boys this year. How much is the number of boys this year compared to last year?
新民小学去年有女生200人，男生比女生多80人，今年女生人数比去年增加了(1/5)，比今年男生人数多30人，今年男生人数比去年减少多少．
<gadget id="calculator">200 + 80</gadget>
<output>280</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">200 * (6/5)</gadget>
<output>240</output>

<gadget id="calculator">240 - 30</gadget>
<output>210</output>

<gadget id="calculator">280 - 210</gadget>
<output>70</output>

<gadget id="calculator">70 / 280</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>