-78.85% is the change from 851 to 180
Calculation steps:
[( 180 - 851 ) ÷ 851] x 100 = -78.85%
Formula
Percentage change = [(180 - 851) / 851] x 100
Subtract the new number by the original number
180 - 851 = -671
-671 ÷ 851 = -0.7884841363102233
-0.7884841363102233 x 100 = -78.85%