-37.42% is the change from 489 to 306
Calculation steps:
[( 306 - 489 ) ÷ 489] x 100 = -37.42%
Formula
Percentage change = [(306 - 489) / 489] x 100
Subtract the new number by the original number
306 - 489 = -183
-183 ÷ 489 = -0.37423312883435583
-0.37423312883435583 x 100 = -37.42%