-92.06% is the change from 491 to 39
Calculation steps:
[( 39 - 491 ) ÷ 491] x 100 = -92.06%
Formula
Percentage change = [(39 - 491) / 491] x 100
Subtract the new number by the original number
39 - 491 = -452
-452 ÷ 491 = -0.9205702647657841
-0.9205702647657841 x 100 = -92.06%