Question

Which of the following is the ratio between a number and the number obtained by adding one-fifth of that number to it?

Options

• 4 : 5

• 5 : 4

• 5 : 6

• 6 : 5

Answer 1

5 : 6

Explanation:

Let the number be n. The increased number is `(6n)/5`, so their ratio is `n : (6n)/5 = 5 : 6`. The other options do not represent this ratio.