-77.79% is the change from 851 to 189
Calculation steps:
[( 189 - 851 ) ÷ 851] x 100 = -77.79%
Formula
Percentage change = [(189 - 851) / 851] x 100
Subtract the new number by the original number
189 - 851 = -662
-662 ÷ 851 = -0.7779083431257344
-0.7779083431257344 x 100 = -77.79%