-81.18% is the change from 542 to 102
Calculation steps:
[( 102 - 542 ) ÷ 542] x 100 = -81.18%
Formula
Percentage change = [(102 - 542) / 542] x 100
Subtract the new number by the original number
102 - 542 = -440
-440 ÷ 542 = -0.8118081180811808
-0.8118081180811808 x 100 = -81.18%