-96.65% is the change from 508 to 17
Calculation steps:
[( 17 - 508 ) ÷ 508] x 100 = -96.65%
Formula
Percentage change = [(17 - 508) / 508] x 100
Subtract the new number by the original number
17 - 508 = -491
-491 ÷ 508 = -0.9665354330708661
-0.9665354330708661 x 100 = -96.65%