-7.27% is the change from 330 to 306
Calculation steps:
[( 306 - 330 ) ÷ 330] x 100 = -7.27%
Formula
Percentage change = [(306 - 330) / 330] x 100
Subtract the new number by the original number
306 - 330 = -24
-24 ÷ 330 = -0.07272727272727272
-0.07272727272727272 x 100 = -7.27%