-41.48% is the change from 921 to 539
Calculation steps:
[( 539 - 921 ) ÷ 921] x 100 = -41.48%
Formula
Percentage change = [(539 - 921) / 921] x 100
Subtract the new number by the original number
539 - 921 = -382
-382 ÷ 921 = -0.4147665580890337
-0.4147665580890337 x 100 = -41.48%