In the 4th China County Economic Basic Competitiveness Top 100 Counties (Cities) Appraisal, Hebei Province accounted for (3/100), Liaoning Province accounted for (1/20), Shandong Province accounted for (21/100), three What percentage of the total are the provinces?
在第四届中国县域经济基本竞争力百强县(市)评比中，河北省的占(3/100)，辽宁省的占(1/20)，山东省的占(21/100)，三个省共占总数的几分之几？
<gadget id="calculator">3 / 100</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">21 / 100</gadget>
<output>21/100 = around 0.21</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(3/100) + (21/100) + (1/20)</gadget>
<output>29/100 = around 0.29</output>

<result>29/100 = around 0.29</result>