-36.41% is the change from 390 to 248
Calculation steps:
[( 248 - 390 ) ÷ 390] x 100 = -36.41%
Formula
Percentage change = [(248 - 390) / 390] x 100
Subtract the new number by the original number
248 - 390 = -142
-142 ÷ 390 = -0.3641025641025641
-0.3641025641025641 x 100 = -36.41%