-96.79% is the change from 591 to 19
Calculation steps:
[( 19 - 591 ) ÷ 591] x 100 = -96.79%
Formula
Percentage change = [(19 - 591) / 591] x 100
Subtract the new number by the original number
19 - 591 = -572
-572 ÷ 591 = -0.9678510998307953
-0.9678510998307953 x 100 = -96.79%