-30.82% is the change from 834 to 577
Calculation steps:
[( 577 - 834 ) ÷ 834] x 100 = -30.82%
Formula
Percentage change = [(577 - 834) / 834] x 100
Subtract the new number by the original number
577 - 834 = -257
-257 ÷ 834 = -0.30815347721822545
-0.30815347721822545 x 100 = -30.82%