-3.43% is the change from 845 to 816
Calculation steps:
[( 816 - 845 ) ÷ 845] x 100 = -3.43%
Formula
Percentage change = [(816 - 845) / 845] x 100
Subtract the new number by the original number
816 - 845 = -29
-29 ÷ 845 = -0.03431952662721893
-0.03431952662721893 x 100 = -3.43%