-16.79% is the change from 542 to 451
Calculation steps:
[( 451 - 542 ) ÷ 542] x 100 = -16.79%
Formula
Percentage change = [(451 - 542) / 542] x 100
Subtract the new number by the original number
451 - 542 = -91
-91 ÷ 542 = -0.16789667896678967
-0.16789667896678967 x 100 = -16.79%