Which of the following ratios is greatest ?  Options:  A) 7 :15  B) 15 :23  C) 17 :25  D) 21 :29  E) 1 : 2
7/15 = 0.466,   15/23 = 0.652,   17/25= 
<gadget id="calculator">17/25</gadget>
<output>17/25 = around 0.68</output>
0.68   21/29= 0.724   Clearly, 0.724 is greatest   therefore, 21 : 29 is greatest   ANSWER:21 :29
<result>D</result>
Which of the following ratios is greatest ?