-40.58% is the change from 860 to 511
Calculation steps:
[( 511 - 860 ) ÷ 860] x 100 = -40.58%
Formula
Percentage change = [(511 - 860) / 860] x 100
Subtract the new number by the original number
511 - 860 = -349
-349 ÷ 860 = -0.40581395348837207
-0.40581395348837207 x 100 = -40.58%