-39.07% is the change from 558 to 340
Calculation steps:
[( 340 - 558 ) ÷ 558] x 100 = -39.07%
Formula
Percentage change = [(340 - 558) / 558] x 100
Subtract the new number by the original number
340 - 558 = -218
-218 ÷ 558 = -0.3906810035842294
-0.3906810035842294 x 100 = -39.07%