-96.12% is the change from 490 to 19
Calculation steps:
[( 19 - 490 ) ÷ 490] x 100 = -96.12%
Formula
Percentage change = [(19 - 490) / 490] x 100
Subtract the new number by the original number
19 - 490 = -471
-471 ÷ 490 = -0.9612244897959183
-0.9612244897959183 x 100 = -96.12%