The original 5 cubic meters of bricks on the construction site have been used, and now there are still 2 cubic meters left. What fraction of the total is used?
工地上原有5立方米的砖，用了一些后，现在还剩2立方米，用掉总数的几分之几？
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>