-19.53% is the change from 845 to 680
Calculation steps:
[( 680 - 845 ) ÷ 845] x 100 = -19.53%
Formula
Percentage change = [(680 - 845) / 845] x 100
Subtract the new number by the original number
680 - 845 = -165
-165 ÷ 845 = -0.1952662721893491
-0.1952662721893491 x 100 = -19.53%