-82.49% is the change from 851 to 149
Calculation steps:
[( 149 - 851 ) ÷ 851] x 100 = -82.49%
Formula
Percentage change = [(149 - 851) / 851] x 100
Subtract the new number by the original number
149 - 851 = -702
-702 ÷ 851 = -0.8249118683901293
-0.8249118683901293 x 100 = -82.49%