-64.87% is the change from 390 to 137
Calculation steps:
[( 137 - 390 ) ÷ 390] x 100 = -64.87%
Formula
Percentage change = [(137 - 390) / 390] x 100
Subtract the new number by the original number
137 - 390 = -253
-253 ÷ 390 = -0.6487179487179487
-0.6487179487179487 x 100 = -64.87%