Joseph is 3/5 times as old as John.What is the ratio of John's age to Joseph's age?

John's age ---- x

Joe's age ---- (3/5)x

John's age : Joe's age
= x : 3x/5
= 1 : 3/5
= 5 : 3

Let's assume John's age is represented by J and Joseph's age is represented by J. Given that Joseph is 3/5 times as old as John, we can set up the equation:

Joseph's age = (3/5) * John's age

Substituting J for John's age and J for Joseph's age, the equation becomes:

J = (3/5) * J

To simplify the equation, we can multiply both sides by 5 to remove the fraction:

5 * J = 3 * J

Now, let's divide both sides by J to isolate J:

5 = 3

This equation is not possible, as 5 cannot equal 3. Therefore, there is an error in the information provided. Please double-check the given data.

To find the ratio of John's age to Joseph's age, we need to determine their ages relative to each other.

Let's assume John's age as J and Joseph's age as J.
According to the given information, Joseph is 3/5 times as old as John. This can be expressed as:
Joseph's age = (3/5) * John's age.

To find the ratio, we divide John's age by Joseph's age:
Ratio = John's age / Joseph's age

Substituting the values:
Ratio = J / [(3/5) * J]

Simplifying the expression:
Ratio = 5/3

Therefore, the ratio of John's age to Joseph's age is 5:3.