-33.13% is the change from 963 to 644
Calculation steps:
[( 644 - 963 ) ÷ 963] x 100 = -33.13%
Formula
Percentage change = [(644 - 963) / 963] x 100
Subtract the new number by the original number
644 - 963 = -319
-319 ÷ 963 = -0.3312564901349948
-0.3312564901349948 x 100 = -33.13%