-83.51% is the change from 837 to 138
Calculation steps:
[( 138 - 837 ) ÷ 837] x 100 = -83.51%
Formula
Percentage change = [(138 - 837) / 837] x 100
Subtract the new number by the original number
138 - 837 = -699
-699 ÷ 837 = -0.8351254480286738
-0.8351254480286738 x 100 = -83.51%