-87.69% is the change from 390 to 48
Calculation steps:
[( 48 - 390 ) ÷ 390] x 100 = -87.69%
Formula
Percentage change = [(48 - 390) / 390] x 100
Subtract the new number by the original number
48 - 390 = -342
-342 ÷ 390 = -0.8769230769230769
-0.8769230769230769 x 100 = -87.69%