-37.17% is the change from 487 to 306
Calculation steps:
[( 306 - 487 ) ÷ 487] x 100 = -37.17%
Formula
Percentage change = [(306 - 487) / 487] x 100
Subtract the new number by the original number
306 - 487 = -181
-181 ÷ 487 = -0.37166324435318276
-0.37166324435318276 x 100 = -37.17%