-81.23% is the change from 826 to 155
Calculation steps:
[( 155 - 826 ) ÷ 826] x 100 = -81.23%
Formula
Percentage change = [(155 - 826) / 826] x 100
Subtract the new number by the original number
155 - 826 = -671
-671 ÷ 826 = -0.8123486682808717
-0.8123486682808717 x 100 = -81.23%