-25.89% is the change from 838 to 621
Calculation steps:
[( 621 - 838 ) ÷ 838] x 100 = -25.89%
Formula
Percentage change = [(621 - 838) / 838] x 100
Subtract the new number by the original number
621 - 838 = -217
-217 ÷ 838 = -0.25894988066825775
-0.25894988066825775 x 100 = -25.89%