-18.78% is the change from 490 to 398
Calculation steps:
[( 398 - 490 ) ÷ 490] x 100 = -18.78%
Formula
Percentage change = [(398 - 490) / 490] x 100
Subtract the new number by the original number
398 - 490 = -92
-92 ÷ 490 = -0.18775510204081633
-0.18775510204081633 x 100 = -18.78%