-69.89% is the change from 857 to 258
Calculation steps:
[( 258 - 857 ) ÷ 857] x 100 = -69.89%
Formula
Percentage change = [(258 - 857) / 857] x 100
Subtract the new number by the original number
258 - 857 = -599
-599 ÷ 857 = -0.6989498249708285
-0.6989498249708285 x 100 = -69.89%