-2.45% is the change from 490 to 478
Calculation steps:
[( 478 - 490 ) ÷ 490] x 100 = -2.45%
Formula
Percentage change = [(478 - 490) / 490] x 100
Subtract the new number by the original number
478 - 490 = -12
-12 ÷ 490 = -0.024489795918367346
-0.024489795918367346 x 100 = -2.45%
Example