-37.41% is the change from 866 to 542
Calculation steps:
[( 542 - 866 ) ÷ 866] x 100 = -37.41%
Formula
Percentage change = [(542 - 866) / 866] x 100
Subtract the new number by the original number
542 - 866 = -324
-324 ÷ 866 = -0.3741339491916859
-0.3741339491916859 x 100 = -37.41%