-21.25% is the change from 814 to 641
Calculation steps:
[( 641 - 814 ) ÷ 814] x 100 = -21.25%
Formula
Percentage change = [(641 - 814) / 814] x 100
Subtract the new number by the original number
641 - 814 = -173
-173 ÷ 814 = -0.21253071253071254
-0.21253071253071254 x 100 = -21.25%