-38.07% is the change from 549 to 340
Calculation steps:
[( 340 - 549 ) ÷ 549] x 100 = -38.07%
Formula
Percentage change = [(340 - 549) / 549] x 100
Subtract the new number by the original number
340 - 549 = -209
-209 ÷ 549 = -0.3806921675774135
-0.3806921675774135 x 100 = -38.07%