-2.52% is the change from 556 to 542
Calculation steps:
[( 542 - 556 ) ÷ 556] x 100 = -2.52%
Formula
Percentage change = [(542 - 556) / 556] x 100
Subtract the new number by the original number
542 - 556 = -14
-14 ÷ 556 = -0.025179856115107913
-0.025179856115107913 x 100 = -2.52%