-21.63% is the change from 800 to 627
Calculation steps:
[( 627 - 800 ) ÷ 800] x 100 = -21.63%
Formula
Percentage change = [(627 - 800) / 800] x 100
Subtract the new number by the original number
627 - 800 = -173
-173 ÷ 800 = -0.21625
-0.21625 x 100 = -21.63%