-37.3% is the change from 488 to 306
Calculation steps:
[( 306 - 488 ) ÷ 488] x 100 = -37.3%
Formula
Percentage change = [(306 - 488) / 488] x 100
Subtract the new number by the original number
306 - 488 = -182
-182 ÷ 488 = -0.3729508196721312
-0.3729508196721312 x 100 = -37.3%