-33.26% is the change from 968 to 646
Calculation steps:
[( 646 - 968 ) ÷ 968] x 100 = -33.26%
Formula
Percentage change = [(646 - 968) / 968] x 100
Subtract the new number by the original number
646 - 968 = -322
-322 ÷ 968 = -0.33264462809917356
-0.33264462809917356 x 100 = -33.26%