-40.47% is the change from 860 to 512
Calculation steps:
[( 512 - 860 ) ÷ 860] x 100 = -40.47%
Formula
Percentage change = [(512 - 860) / 860] x 100
Subtract the new number by the original number
512 - 860 = -348
-348 ÷ 860 = -0.4046511627906977
-0.4046511627906977 x 100 = -40.47%