-37.55% is the change from 490 to 306
Calculation steps:
[( 306 - 490 ) ÷ 490] x 100 = -37.55%
Formula
Percentage change = [(306 - 490) / 490] x 100
Subtract the new number by the original number
306 - 490 = -184
-184 ÷ 490 = -0.37551020408163266
-0.37551020408163266 x 100 = -37.55%