-43.59% is the change from 390 to 220
Calculation steps:
[( 220 - 390 ) ÷ 390] x 100 = -43.59%
Formula
Percentage change = [(220 - 390) / 390] x 100
Subtract the new number by the original number
220 - 390 = -170
-170 ÷ 390 = -0.4358974358974359
-0.4358974358974359 x 100 = -43.59%