-32.36% is the change from 921 to 623
Calculation steps:
[( 623 - 921 ) ÷ 921] x 100 = -32.36%
Formula
Percentage change = [(623 - 921) / 921] x 100
Subtract the new number by the original number
623 - 921 = -298
-298 ÷ 921 = -0.32356134636264927
-0.32356134636264927 x 100 = -32.36%