-97.76% is the change from 312 to 7
Calculation steps:
[( 7 - 312 ) ÷ 312] x 100 = -97.76%
Formula
Percentage change = [(7 - 312) / 312] x 100
Subtract the new number by the original number
7 - 312 = -305
-305 ÷ 312 = -0.9775641025641025
-0.9775641025641025 x 100 = -97.76%