-96.15% is the change from 493 to 19
Calculation steps:
[( 19 - 493 ) ÷ 493] x 100 = -96.15%
Formula
Percentage change = [(19 - 493) / 493] x 100
Subtract the new number by the original number
19 - 493 = -474
-474 ÷ 493 = -0.9614604462474645
-0.9614604462474645 x 100 = -96.15%