-52.17% is the change from 644 to 308
Calculation steps:
[( 308 - 644 ) ÷ 644] x 100 = -52.17%
Formula
Percentage change = [(308 - 644) / 644] x 100
Subtract the new number by the original number
308 - 644 = -336
-336 ÷ 644 = -0.5217391304347826
-0.5217391304347826 x 100 = -52.17%