-19.57% is the change from 843 to 678
Calculation steps:
[( 678 - 843 ) ÷ 843] x 100 = -19.57%
Formula
Percentage change = [(678 - 843) / 843] x 100
Subtract the new number by the original number
678 - 843 = -165
-165 ÷ 843 = -0.19572953736654805
-0.19572953736654805 x 100 = -19.57%