-68.91% is the change from 312 to 97
Calculation steps:
[( 97 - 312 ) ÷ 312] x 100 = -68.91%
Formula
Percentage change = [(97 - 312) / 312] x 100
Subtract the new number by the original number
97 - 312 = -215
-215 ÷ 312 = -0.6891025641025641
-0.6891025641025641 x 100 = -68.91%