-64.86% is the change from 939 to 330
Calculation steps:
[( 330 - 939 ) ÷ 939] x 100 = -64.86%
Formula
Percentage change = [(330 - 939) / 939] x 100
Subtract the new number by the original number
330 - 939 = -609
-609 ÷ 939 = -0.6485623003194888
-0.6485623003194888 x 100 = -64.86%