autocomplete drop down option width wider than items in list(left to right)

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HTML

hi,

my dropdown options width inside a div is higher than dropdown. my code as below,

<input class="ui-state-default ui-combobox-input ui-autocomplete-input ui-widget ui-widget-content ui-corner-left" id="txtHotelName" placeholder="Type city, area name or hotel name" type="text" style="width: 50%;" onclick="HideError('txtfromAirport');" />

image url as below,

http://imgur.com/UD6MB4e

how to solve this issue?:(

thanks