-83.6% is the change from 817 to 134
Calculation steps:
[( 134 - 817 ) ÷ 817] x 100 = -83.6%
Formula
Percentage change = [(134 - 817) / 817] x 100
Subtract the new number by the original number
134 - 817 = -683
-683 ÷ 817 = -0.835985312117503
-0.835985312117503 x 100 = -83.6%