-33.82% is the change from 819 to 542
Calculation steps:
[( 542 - 819 ) ÷ 819] x 100 = -33.82%
Formula
Percentage change = [(542 - 819) / 819] x 100
Subtract the new number by the original number
542 - 819 = -277
-277 ÷ 819 = -0.33821733821733824
-0.33821733821733824 x 100 = -33.82%