-37.04% is the change from 486 to 306
Calculation steps:
[( 306 - 486 ) ÷ 486] x 100 = -37.04%
Formula
Percentage change = [(306 - 486) / 486] x 100
Subtract the new number by the original number
306 - 486 = -180
-180 ÷ 486 = -0.37037037037037035
-0.37037037037037035 x 100 = -37.04%