-40.16% is the change from 854 to 511
Calculation steps:
[( 511 - 854 ) ÷ 854] x 100 = -40.16%
Formula
Percentage change = [(511 - 854) / 854] x 100
Subtract the new number by the original number
511 - 854 = -343
-343 ÷ 854 = -0.4016393442622951
-0.4016393442622951 x 100 = -40.16%