-45.4% is the change from 923 to 504
Calculation steps:
[( 504 - 923 ) ÷ 923] x 100 = -45.4%
Formula
Percentage change = [(504 - 923) / 923] x 100
Subtract the new number by the original number
504 - 923 = -419
-419 ÷ 923 = -0.4539544962080173
-0.4539544962080173 x 100 = -45.4%