If 20% of first number is equal to four-fifths of second number, what is the ratio of first number to the second number?

Correct option is B

Given:

20% of first number = $$\frac{4}{5}$$​ of second number

Find ratio: First Number : Second Number

Solution:

20% of A = $$\frac45$$​ of B 

​$$\frac{1}{5}A = \frac{4}{5}B$$​​

A = 4B

So,

A : B = 4 : 1