-33.9% is the change from 587 to 388
Calculation steps:
[( 388 - 587 ) ÷ 587] x 100 = -33.9%
Formula
Percentage change = [(388 - 587) / 587] x 100
Subtract the new number by the original number
388 - 587 = -199
-199 ÷ 587 = -0.3390119250425894
-0.3390119250425894 x 100 = -33.9%