-93.5% is the change from 600 to 39
Calculation steps:
[( 39 - 600 ) ÷ 600] x 100 = -93.5%
Formula
Percentage change = [(39 - 600) / 600] x 100
Subtract the new number by the original number
39 - 600 = -561
-561 ÷ 600 = -0.935
-0.935 x 100 = -93.5%
Example