-97.78% is the change from 316 to 7
Calculation steps:
[( 7 - 316 ) ÷ 316] x 100 = -97.78%
Formula
Percentage change = [(7 - 316) / 316] x 100
Subtract the new number by the original number
7 - 316 = -309
-309 ÷ 316 = -0.9778481012658228
-0.9778481012658228 x 100 = -97.78%