The radius of the two circular fields is in the ratio 4: 5 the area of the first field is what percent less than the area of the second?  Choose the most appropriate option:  A) 42%  B) 39%  C) 38%  D) 36%  E) 26%
r = 4 Ï€r2 =16   r = 5 Ï€r2 = 25   25Ï€ â€“ 9Ï€   100 ---- ? =&gt; 36%.Answer:36%
<result>D</result>
The radius of the two circular fields is in the ratio 4: 5 the area of the first field is what percent less than the area of the second?