-6.64% is the change from 542 to 506
Calculation steps:
[( 506 - 542 ) ÷ 542] x 100 = -6.64%
Formula
Percentage change = [(506 - 542) / 542] x 100
Subtract the new number by the original number
506 - 542 = -36
-36 ÷ 542 = -0.06642066420664207
-0.06642066420664207 x 100 = -6.64%