Xiao Hua and Xiao Ming each collect 45 stamps, and Xiao Hua gives Xiao Ming 5 stamps. At this time, what percentage of Xiao Hua's stamps is Xiao Ming's?
小华和小明各集邮票45张，小华的邮票给小明5张，这时，小华的邮票是小明的百分之几？
<gadget id="calculator">45 - 5</gadget>
<output>40</output>

<gadget id="calculator">45 + 5</gadget>
<output>50</output>

<gadget id="calculator">40 / 50</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>