-83.95% is the change from 816 to 131
Calculation steps:
[( 131 - 816 ) ÷ 816] x 100 = -83.95%
Formula
Percentage change = [(131 - 816) / 816] x 100
Subtract the new number by the original number
131 - 816 = -685
-685 ÷ 816 = -0.8394607843137255
-0.8394607843137255 x 100 = -83.95%