If 4a = 5b and ab ≠0, what is the ratio of a/5 to b/4? Choose the correct choice from the following answers
A) 125/64 B) 25/16 C) 1 D) 4/5 E) 64/125
A nice fast approach is the first find a pair of numbers that satisfy the given equation: 4a = 5b   Here's one pair: a =5 and b =4   What is the ratio of a/5 to b/4?   In other words, what is the value of (a/5)/(b/4)?   Plug in values to get: (a/5)/(b/4) = (5/5)/(4/4)= 
<gadget id="calculator">(5/5)/(4/4)</gadget>
<output>1</output>
1/1= 
<gadget id="calculator">1/1</gadget>
<output>1</output>
1   1
<result>C</result>
If 4a = 5b and ab ≠0, what is the ratio of a/5 to b/4?