-70.99% is the change from 886 to 257
Calculation steps:
[( 257 - 886 ) ÷ 886] x 100 = -70.99%
Formula
Percentage change = [(257 - 886) / 886] x 100
Subtract the new number by the original number
257 - 886 = -629
-629 ÷ 886 = -0.7099322799097065
-0.7099322799097065 x 100 = -70.99%