-34.28% is the change from 318 to 209
Calculation steps:
[( 209 - 318 ) ÷ 318] x 100 = -34.28%
Formula
Percentage change = [(209 - 318) / 318] x 100
Subtract the new number by the original number
209 - 318 = -109
-109 ÷ 318 = -0.34276729559748426
-0.34276729559748426 x 100 = -34.28%