-97.81% is the change from 549 to 12
Calculation steps:
[( 12 - 549 ) ÷ 549] x 100 = -97.81%
Formula
Percentage change = [(12 - 549) / 549] x 100
Subtract the new number by the original number
12 - 549 = -537
-537 ÷ 549 = -0.9781420765027322
-0.9781420765027322 x 100 = -97.81%