The latter term of a ratio is (1/5), and the ratio is 1.25. What is the former term of this ratio.
一个比的后项是(1/5)，比值是1.25，这个比的前项是多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1.25 * (1/5)</gadget>
<output>0.25</output>

<result>0.25</result>