There are 50 students in class 2 of the sixth year, and 45 students are excellent in the physical examination. The excellent rate is (how much).
六年2班有50人，体育测试得优的有45人，优秀率是(多少)．
<gadget id="calculator">45 / 50</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(9/10) * 1</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>