Which of the following ratios is greatest ?	Select:
A) 7 :15
B) 15 :23
C) 17 :25
D) 21 :29
E) 22: 29
Expl : 7/15 = 0.466, 15/23 = 0.652, 17/25 = 0.68 21/29 = 0.724   Clearly, 0.724 is greatest and therefore, 21 : 29 is greatest   Answer: 21 :29
<result>D</result>
Which of the following ratios is greatest ?