-75.09% is the change from 851 to 212
Calculation steps:
[( 212 - 851 ) ÷ 851] x 100 = -75.09%
Formula
Percentage change = [(212 - 851) / 851] x 100
Subtract the new number by the original number
212 - 851 = -639
-639 ÷ 851 = -0.7508813160987075
-0.7508813160987075 x 100 = -75.09%