-40% is the change from 600 to 360
Calculation steps:
[( 360 - 600 ) ÷ 600] x 100 = -40%
Formula
Percentage change = [(360 - 600) / 600] x 100
Subtract the new number by the original number
360 - 600 = -240
-240 ÷ 600 = -0.4
-0.4 x 100 = -40%
Example