-31.46% is the change from 909 to 623
Calculation steps:
[( 623 - 909 ) ÷ 909] x 100 = -31.46%
Formula
Percentage change = [(623 - 909) / 909] x 100
Subtract the new number by the original number
623 - 909 = -286
-286 ÷ 909 = -0.3146314631463146
-0.3146314631463146 x 100 = -31.46%