-16.77% is the change from 775 to 645
Calculation steps:
[( 645 - 775 ) ÷ 775] x 100 = -16.77%
Formula
Percentage change = [(645 - 775) / 775] x 100
Subtract the new number by the original number
645 - 775 = -130
-130 ÷ 775 = -0.16774193548387098
-0.16774193548387098 x 100 = -16.77%