-18.77% is the change from 826 to 671
Calculation steps:
[( 671 - 826 ) ÷ 826] x 100 = -18.77%
Formula
Percentage change = [(671 - 826) / 826] x 100
Subtract the new number by the original number
671 - 826 = -155
-155 ÷ 826 = -0.18765133171912832
-0.18765133171912832 x 100 = -18.77%