-38.66% is the change from 833 to 511
Calculation steps:
[( 511 - 833 ) ÷ 833] x 100 = -38.66%
Formula
Percentage change = [(511 - 833) / 833] x 100
Subtract the new number by the original number
511 - 833 = -322
-322 ÷ 833 = -0.3865546218487395
-0.3865546218487395 x 100 = -38.66%