-19.8% is the change from 490 to 393
Calculation steps:
[( 393 - 490 ) ÷ 490] x 100 = -19.8%
Formula
Percentage change = [(393 - 490) / 490] x 100
Subtract the new number by the original number
393 - 490 = -97
-97 ÷ 490 = -0.19795918367346937
-0.19795918367346937 x 100 = -19.8%