Affected by rising international oil prices, the price of gas has risen from 80 yuan per bottle to 115 yuan. What percentage is the increase now?
受国际油价上涨影响，煤气价格由原来每瓶80元上升到115元，现在比原来上升了百分之几？
<gadget id="calculator">115 - 80</gadget>
<output>35</output>

<gadget id="calculator">35 / 80</gadget>
<output>7/16 = around 0.4375</output>

<result>7/16 = around 0.4375</result>