-96.54% is the change from 491 to 17
Calculation steps:
[( 17 - 491 ) ÷ 491] x 100 = -96.54%
Formula
Percentage change = [(17 - 491) / 491] x 100
Subtract the new number by the original number
17 - 491 = -474
-474 ÷ 491 = -0.9653767820773931
-0.9653767820773931 x 100 = -96.54%