-96.54% is the change from 549 to 19
Calculation steps:
[( 19 - 549 ) ÷ 549] x 100 = -96.54%
Formula
Percentage change = [(19 - 549) / 549] x 100
Subtract the new number by the original number
19 - 549 = -530
-530 ÷ 549 = -0.9653916211293261
-0.9653916211293261 x 100 = -96.54%