The ratio of a to b is 4 to 5, where a and b are positive. If x equals a increased by 25 percent of a, and m equals b decreased by 20 percent of b, what is the value of m/x?
Choose the most appropriate option.
A) 2/5
B) 3/4
C) 4/5
D) 5/4
E) 3/2
x equals a increased by 25 percent of a =&gt; x = a + 25%a = 1.25a   m equals b decreased by 20 percent of b =&gt; m = b - 20%b = 0.8b   m/x = 0.8b/1.25a   Putting the value of b/a = 5/4 we get m/x = 4/5   ANSWER:4/5
<result>C</result>
The ratio of a to b is 4 to 5, where a and b are positive. If x equals a increased by 25 percent of a, and m equals b decreased by 20 percent of b, what is the value of m/x?