-70.59% is the change from 867 to 255
Calculation steps:
[( 255 - 867 ) ÷ 867] x 100 = -70.59%
Formula
Percentage change = [(255 - 867) / 867] x 100
Subtract the new number by the original number
255 - 867 = -612
-612 ÷ 867 = -0.7058823529411765
-0.7058823529411765 x 100 = -70.59%