-16.9% is the change from 775 to 644
Calculation steps:
[( 644 - 775 ) ÷ 775] x 100 = -16.9%
Formula
Percentage change = [(644 - 775) / 775] x 100
Subtract the new number by the original number
644 - 775 = -131
-131 ÷ 775 = -0.16903225806451613
-0.16903225806451613 x 100 = -16.9%