-38.53% is the change from 340 to 209
Calculation steps:
[( 209 - 340 ) ÷ 340] x 100 = -38.53%
Formula
Percentage change = [(209 - 340) / 340] x 100
Subtract the new number by the original number
209 - 340 = -131
-131 ÷ 340 = -0.38529411764705884
-0.38529411764705884 x 100 = -38.53%