How to change the y axis of a histogram so it's a density function in r?

Question

How is it possible that I can change a normal histogram in a way that the x-axis indicates not absolute numbers but the relative numbers, the density?

This is what my histogram looks like now:

hist(df$rent, xlim = c(0, 36), ylim = c(0, 300), breaks = 30)

Answer 1

To add the argument

freq = FALSE

is the solution