Xiaoming's electricity bill in September is 150 yuan. After installing the time-sharing meter, the electricity bill in October is 10% lower than that in September. How much is the electricity bill in October?
小明家九月份的电费是150元，安装分时电表后，十月份的电费比九月份减少10%．十月份的电费是多少元？
<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>

<gadget id="calculator">150 * (9/10)</gadget>
<output>135</output>

<result>135</result>