The school shipped 120 tons of rice. They ate 1/4 of the total in the first month and 20% of the total in the second month. How much? (Add a two-step solution to the problem, and then answer)
学校运来120吨大米，第一个月吃了总数的(1/4)，第二个月吃了总数的20%，多少？(补充一个两步解决的问题，再解答)
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<result>11/20 = around 0.55</result>