# Calculate total percent change from incremental changes

Is there a formula to calculate a total percent change of a value from multiple changes?

Example:

Initial: 100
-10%: 90
+5%: 94.5
-20%: 75.6


So I am looking for some formulaic way of taking the initial value of 100 and the changes of -10%,+5%, and -20% and giving me 75.6.