-70.41% is the change from 338 to 100
Calculation steps:
[( 100 - 338 ) ÷ 338] x 100 = -70.41%
Formula
Percentage change = [(100 - 338) / 338] x 100
Subtract the new number by the original number
100 - 338 = -238
-238 ÷ 338 = -0.7041420118343196
-0.7041420118343196 x 100 = -70.41%