-93.08% is the change from 390 to 27
Calculation steps:
[( 27 - 390 ) ÷ 390] x 100 = -93.08%
Formula
Percentage change = [(27 - 390) / 390] x 100
Subtract the new number by the original number
27 - 390 = -363
-363 ÷ 390 = -0.9307692307692308
-0.9307692307692308 x 100 = -93.08%