-21.02% is the change from 490 to 387
Calculation steps:
[( 387 - 490 ) ÷ 490] x 100 = -21.02%
Formula
Percentage change = [(387 - 490) / 490] x 100
Subtract the new number by the original number
387 - 490 = -103
-103 ÷ 490 = -0.21020408163265306
-0.21020408163265306 x 100 = -21.02%