Wang Hua writes 20 characters per minute, and Xiao Li writes 28 characters per minute. What fraction of what Wang Hua writes per minute is what Xiao Li writes per minute?
王华每分钟写20个大字，肖丽每分钟写28个大字，王华每分钟写的是肖丽每分钟写的几分之几？
<gadget id="calculator">20 / 28</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>