-54.34% is the change from 219 to 100
Calculation steps:
[( 100 - 219 ) ÷ 219] x 100 = -54.34%
Formula
Percentage change = [(100 - 219) / 219] x 100
Subtract the new number by the original number
100 - 219 = -119
-119 ÷ 219 = -0.54337899543379
-0.54337899543379 x 100 = -54.34%