-8.66% is the change from 647 to 591
Calculation steps:
[( 591 - 647 ) ÷ 647] x 100 = -8.66%
Formula
Percentage change = [(591 - 647) / 647] x 100
Subtract the new number by the original number
591 - 647 = -56
-56 ÷ 647 = -0.0865533230293663
-0.0865533230293663 x 100 = -8.66%