-25.54% is the change from 834 to 621
Calculation steps:
[( 621 - 834 ) ÷ 834] x 100 = -25.54%
Formula
Percentage change = [(621 - 834) / 834] x 100
Subtract the new number by the original number
621 - 834 = -213
-213 ÷ 834 = -0.25539568345323743
-0.25539568345323743 x 100 = -25.54%