-97.9% is the change from 333 to 7
Calculation steps:
[( 7 - 333 ) ÷ 333] x 100 = -97.9%
Formula
Percentage change = [(7 - 333) / 333] x 100
Subtract the new number by the original number
7 - 333 = -326
-326 ÷ 333 = -0.978978978978979
-0.978978978978979 x 100 = -97.9%