-85.38% is the change from 390 to 57
Calculation steps:
[( 57 - 390 ) ÷ 390] x 100 = -85.38%
Formula
Percentage change = [(57 - 390) / 390] x 100
Subtract the new number by the original number
57 - 390 = -333
-333 ÷ 390 = -0.8538461538461538
-0.8538461538461538 x 100 = -85.38%