45% of the number A=60% of the number B, and the number B is the number of A.
甲数的45%=乙数的60%，乙数是甲数的多少．
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(9/20) / (3/5)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>