-78.18% is the change from 857 to 187
Calculation steps:
[( 187 - 857 ) ÷ 857] x 100 = -78.18%
Formula
Percentage change = [(187 - 857) / 857] x 100
Subtract the new number by the original number
187 - 857 = -670
-670 ÷ 857 = -0.7817969661610268
-0.7817969661610268 x 100 = -78.18%