-33.37% is the change from 968 to 645
Calculation steps:
[( 645 - 968 ) ÷ 968] x 100 = -33.37%
Formula
Percentage change = [(645 - 968) / 968] x 100
Subtract the new number by the original number
645 - 968 = -323
-323 ÷ 968 = -0.33367768595041325
-0.33367768595041325 x 100 = -33.37%