-97.7% is the change from 304 to 7
Calculation steps:
[( 7 - 304 ) ÷ 304] x 100 = -97.7%
Formula
Percentage change = [(7 - 304) / 304] x 100
Subtract the new number by the original number
7 - 304 = -297
-297 ÷ 304 = -0.9769736842105263
-0.9769736842105263 x 100 = -97.7%