Li Qiang’s household’s utility bill in June was 255 yuan, which was 15% less than in May. How much was the savings compared to May?
李强家六月份的水电费是255元，比五月份节省了15%，比五月份节省了多少元？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">255 / (17/20)</gadget>
<output>300</output>

<gadget id="calculator">300 - 255</gadget>
<output>45</output>

<result>45</result>