-76.68% is the change from 549 to 128
Calculation steps:
[( 128 - 549 ) ÷ 549] x 100 = -76.68%
Formula
Percentage change = [(128 - 549) / 549] x 100
Subtract the new number by the original number
128 - 549 = -421
-421 ÷ 549 = -0.7668488160291439
-0.7668488160291439 x 100 = -76.68%