-5.54% is the change from 542 to 512
Calculation steps:
[( 512 - 542 ) ÷ 542] x 100 = -5.54%
Formula
Percentage change = [(512 - 542) / 542] x 100
Subtract the new number by the original number
512 - 542 = -30
-30 ÷ 542 = -0.055350553505535055
-0.055350553505535055 x 100 = -5.54%