Wang Ming's height this year is 147cm, which is 7cm higher than last year's. How much has Wang Ming's height increased compared to last year?
王明今年的身高是147cm，比去年高了7cm，王明的身高比去年增长了百分之几？
<gadget id="calculator">147 - 7</gadget>
<output>140</output>

<gadget id="calculator">7 / 140</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>