A certain school enrolls 420 new students this year, an increase of 70 compared with last year. How much is the increase compared with last year?
某校今年招收新生420人，比去年增加70人，比去年增加多少．
<gadget id="calculator">420 - 70</gadget>
<output>350</output>

<gadget id="calculator">70 / 350</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>