"The price of each washing machine has been reduced by 10%", that is, what is the original price of each washing machine now.
"每台洗衣机的价钱降低了10%"，也就是现在每台洗衣机的价钱是原来的多少．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

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

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