-97.88% is the change from 330 to 7
Calculation steps:
[( 7 - 330 ) ÷ 330] x 100 = -97.88%
Formula
Percentage change = [(7 - 330) / 330] x 100
Subtract the new number by the original number
7 - 330 = -323
-323 ÷ 330 = -0.9787878787878788
-0.9787878787878788 x 100 = -97.88%