-31.78% is the change from 944 to 644
Calculation steps:
[( 644 - 944 ) ÷ 944] x 100 = -31.78%
Formula
Percentage change = [(644 - 944) / 944] x 100
Subtract the new number by the original number
644 - 944 = -300
-300 ÷ 944 = -0.3177966101694915
-0.3177966101694915 x 100 = -31.78%