-21.08% is the change from 498 to 393
Calculation steps:
[( 393 - 498 ) ÷ 498] x 100 = -21.08%
Formula
Percentage change = [(393 - 498) / 498] x 100
Subtract the new number by the original number
393 - 498 = -105
-105 ÷ 498 = -0.21084337349397592
-0.21084337349397592 x 100 = -21.08%