-26.45% is the change from 877 to 645
Calculation steps:
[( 645 - 877 ) ÷ 877] x 100 = -26.45%
Formula
Percentage change = [(645 - 877) / 877] x 100
Subtract the new number by the original number
645 - 877 = -232
-232 ÷ 877 = -0.2645381984036488
-0.2645381984036488 x 100 = -26.45%