-4.5% is the change from 845 to 807
Calculation steps:
[( 807 - 845 ) ÷ 845] x 100 = -4.5%
Formula
Percentage change = [(807 - 845) / 845] x 100
Subtract the new number by the original number
807 - 845 = -38
-38 ÷ 845 = -0.04497041420118343
-0.04497041420118343 x 100 = -4.5%