A school had 120 students in the fifth grade last year, 25% less than this year. How many students are there in the fifth grade this year?
某学校去年五年级共有学生120人，比今年少25%，今年五年级有学生多少人？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">120 / (3/4)</gadget>
<output>160</output>

<result>160</result>