title: How can I express densities as percentages in R?
body: <p>When I run a density histogram in R, the vertical axis shows densities as fractions. Try this, for example:
  <code>hist(rnorm(100), freq = FALSE)</code></p>
  
  <p>See how the vertical axis shows "0.0", "0.1", "0.2", etc. How can I make it display "0%", "1%", "2%"?</p>