-83.29% is the change from 826 to 138
Calculation steps:
[( 138 - 826 ) ÷ 826] x 100 = -83.29%
Formula
Percentage change = [(138 - 826) / 826] x 100
Subtract the new number by the original number
138 - 826 = -688
-688 ÷ 826 = -0.8329297820823245
-0.8329297820823245 x 100 = -83.29%