-52.17% is the change from 690 to 330
Calculation steps:
[( 330 - 690 ) ÷ 690] x 100 = -52.17%
Formula
Percentage change = [(330 - 690) / 690] x 100
Subtract the new number by the original number
330 - 690 = -360
-360 ÷ 690 = -0.5217391304347826
-0.5217391304347826 x 100 = -52.17%