-70.36% is the change from 867 to 257
Calculation steps:
[( 257 - 867 ) ÷ 867] x 100 = -70.36%
Formula
Percentage change = [(257 - 867) / 867] x 100
Subtract the new number by the original number
257 - 867 = -610
-610 ÷ 867 = -0.7035755478662054
-0.7035755478662054 x 100 = -70.36%