-6.97% is the change from 330 to 307
Calculation steps:
[( 307 - 330 ) ÷ 330] x 100 = -6.97%
Formula
Percentage change = [(307 - 330) / 330] x 100
Subtract the new number by the original number
307 - 330 = -23
-23 ÷ 330 = -0.0696969696969697
-0.0696969696969697 x 100 = -6.97%