-69.86% is the change from 856 to 258
Calculation steps:
[( 258 - 856 ) ÷ 856] x 100 = -69.86%
Formula
Percentage change = [(258 - 856) / 856] x 100
Subtract the new number by the original number
258 - 856 = -598
-598 ÷ 856 = -0.6985981308411215
-0.6985981308411215 x 100 = -69.86%