-37.93% is the change from 493 to 306
Calculation steps:
[( 306 - 493 ) ÷ 493] x 100 = -37.93%
Formula
Percentage change = [(306 - 493) / 493] x 100
Subtract the new number by the original number
306 - 493 = -187
-187 ÷ 493 = -0.3793103448275862
-0.3793103448275862 x 100 = -37.93%