-3.46% is the change from 578 to 558
Calculation steps:
[( 558 - 578 ) ÷ 578] x 100 = -3.46%
Formula
Percentage change = [(558 - 578) / 578] x 100
Subtract the new number by the original number
558 - 578 = -20
-20 ÷ 578 = -0.03460207612456748
-0.03460207612456748 x 100 = -3.46%