-87.39% is the change from 817 to 103
Calculation steps:
[( 103 - 817 ) ÷ 817] x 100 = -87.39%
Formula
Percentage change = [(103 - 817) / 817] x 100
Subtract the new number by the original number
103 - 817 = -714
-714 ÷ 817 = -0.8739290085679314
-0.8739290085679314 x 100 = -87.39%