-37.13% is the change from 921 to 579
Calculation steps:
[( 579 - 921 ) ÷ 921] x 100 = -37.13%
Formula
Percentage change = [(579 - 921) / 921] x 100
Subtract the new number by the original number
579 - 921 = -342
-342 ÷ 921 = -0.3713355048859935
-0.3713355048859935 x 100 = -37.13%