-40.51% is the change from 859 to 511
Calculation steps:
[( 511 - 859 ) ÷ 859] x 100 = -40.51%
Formula
Percentage change = [(511 - 859) / 859] x 100
Subtract the new number by the original number
511 - 859 = -348
-348 ÷ 859 = -0.4051222351571595
-0.4051222351571595 x 100 = -40.51%