Bar chart vs Pie Chart

Hi Folks!

This might be a really basic question but I can't work it out!

I've been using the Pie Chart to show the sales by Price Type category and I love that it shows me the percentage of sales of each price type.

Is there a way for the Y-axis of Bar Chart to be the percentage - so each bar is the percentage of sales per price type - rather than the actual number

I'm more interested in the ratio than the actual numbers but prefer the look of the Bar Chart in my dashboard

Cheers, 
Nicola