-83.31% is the change from 827 to 138
Calculation steps:
[( 138 - 827 ) ÷ 827] x 100 = -83.31%
Formula
Percentage change = [(138 - 827) / 827] x 100
Subtract the new number by the original number
138 - 827 = -689
-689 ÷ 827 = -0.8331318016928658
-0.8331318016928658 x 100 = -83.31%