-89.35% is the change from 169 to 18
Calculation steps:
[( 18 - 169 ) ÷ 169] x 100 = -89.35%
Formula
Percentage change = [(18 - 169) / 169] x 100
Subtract the new number by the original number
18 - 169 = -151
-151 ÷ 169 = -0.893491124260355
-0.893491124260355 x 100 = -89.35%