Xiaoli weighed 40kg this year and 35kg last year. How much weight did you gain this year compared to last year? what is the correct formula
小利今年体重40kg，去年体重35kg．今年体重比去年增加百分之几？正确的算式是多少
<gadget id="calculator">40 - 35</gadget>
<output>5</output>

<gadget id="calculator">5 / 35</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>