-40.47% is the change from 971 to 578
Calculation steps:
[( 578 - 971 ) ÷ 971] x 100 = -40.47%
Formula
Percentage change = [(578 - 971) / 971] x 100
Subtract the new number by the original number
578 - 971 = -393
-393 ÷ 971 = -0.4047373841400618
-0.4047373841400618 x 100 = -40.47%