-48% is the change from 750 to 390
Calculation steps:
[( 390 - 750 ) ÷ 750] x 100 = -48%
Formula
Percentage change = [(390 - 750) / 750] x 100
Subtract the new number by the original number
390 - 750 = -360
-360 ÷ 750 = -0.48
-0.48 x 100 = -48%
Example