-19.82% is the change from 338 to 271
Calculation steps:
[( 271 - 338 ) ÷ 338] x 100 = -19.82%
Formula
Percentage change = [(271 - 338) / 338] x 100
Subtract the new number by the original number
271 - 338 = -67
-67 ÷ 338 = -0.19822485207100593
-0.19822485207100593 x 100 = -19.82%