-41.59% is the change from 921 to 538
Calculation steps:
[( 538 - 921 ) ÷ 921] x 100 = -41.59%
Formula
Percentage change = [(538 - 921) / 921] x 100
Subtract the new number by the original number
538 - 921 = -383
-383 ÷ 921 = -0.4158523344191097
-0.4158523344191097 x 100 = -41.59%