-54.36% is the change from 390 to 178
Calculation steps:
[( 178 - 390 ) ÷ 390] x 100 = -54.36%
Formula
Percentage change = [(178 - 390) / 390] x 100
Subtract the new number by the original number
178 - 390 = -212
-212 ÷ 390 = -0.5435897435897435
-0.5435897435897435 x 100 = -54.36%