-54.79% is the change from 219 to 99
Calculation steps:
[( 99 - 219 ) ÷ 219] x 100 = -54.79%
Formula
Percentage change = [(99 - 219) / 219] x 100
Subtract the new number by the original number
99 - 219 = -120
-120 ÷ 219 = -0.547945205479452
-0.547945205479452 x 100 = -54.79%