-30.15% is the change from 922 to 644
Calculation steps:
[( 644 - 922 ) ÷ 922] x 100 = -30.15%
Formula
Percentage change = [(644 - 922) / 922] x 100
Subtract the new number by the original number
644 - 922 = -278
-278 ÷ 922 = -0.30151843817787416
-0.30151843817787416 x 100 = -30.15%