Which of the following is the lowest ratio ?
Which of the following is the lowest ratio ? Correct Answer 7 : 15
$$\eqalign{ & \Rightarrow 7:15 = \frac{7}{{15}} = 0.466 \cr & \Rightarrow 15:23 = \frac{{15}}{{23}} = 0.652 \cr & \Rightarrow 17:25 = \frac{{17}}{{25}} = 0.68 \cr & \Rightarrow 21:39 = \frac{{21}}{{39}} = 0.538 \cr} $$Clearly, 7 : 15 is the lowest
