-25.98% is the change from 839 to 621
Calculation steps:
[( 621 - 839 ) ÷ 839] x 100 = -25.98%
Formula
Percentage change = [(621 - 839) / 839] x 100
Subtract the new number by the original number
621 - 839 = -218
-218 ÷ 839 = -0.2598331346841478
-0.2598331346841478 x 100 = -25.98%