-41.15% is the change from 921 to 542
Calculation steps:
[( 542 - 921 ) ÷ 921] x 100 = -41.15%
Formula
Percentage change = [(542 - 921) / 921] x 100
Subtract the new number by the original number
542 - 921 = -379
-379 ÷ 921 = -0.41150922909880566
-0.41150922909880566 x 100 = -41.15%