Warehouse A has 30 tons of fertilizer, and Warehouse B has 40 tons of fertilizer. How much less fertilizer is there in Warehouse A than in Warehouse B?
甲仓库有化肥30吨，乙仓库有化肥40吨，甲仓库的化肥比乙仓库少几分之几？
<gadget id="calculator">40 - 30</gadget>
<output>10</output>

<gadget id="calculator">10 / 40</gadget>
<output>1/4 = around 0.25</output>

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