-61.02% is the change from 254 to 99
Calculation steps:
[( 99 - 254 ) ÷ 254] x 100 = -61.02%
Formula
Percentage change = [(99 - 254) / 254] x 100
Subtract the new number by the original number
99 - 254 = -155
-155 ÷ 254 = -0.610236220472441
-0.610236220472441 x 100 = -61.02%