-45.78% is the change from 391 to 212
Calculation steps:
[( 212 - 391 ) ÷ 391] x 100 = -45.78%
Formula
Percentage change = [(212 - 391) / 391] x 100
Subtract the new number by the original number
212 - 391 = -179
-179 ÷ 391 = -0.4578005115089514
-0.4578005115089514 x 100 = -45.78%