-96.36% is the change from 549 to 20
Calculation steps:
[( 20 - 549 ) ÷ 549] x 100 = -96.36%
Formula
Percentage change = [(20 - 549) / 549] x 100
Subtract the new number by the original number
20 - 549 = -529
-529 ÷ 549 = -0.9635701275045537
-0.9635701275045537 x 100 = -96.36%