-36.72% is the change from 817 to 517
Calculation steps:
[( 517 - 817 ) ÷ 817] x 100 = -36.72%
Formula
Percentage change = [(517 - 817) / 817] x 100
Subtract the new number by the original number
517 - 817 = -300
-300 ÷ 817 = -0.3671970624235006
-0.3671970624235006 x 100 = -36.72%