-97.12% is the change from 312 to 9
Calculation steps:
[( 9 - 312 ) ÷ 312] x 100 = -97.12%
Formula
Percentage change = [(9 - 312) / 312] x 100
Subtract the new number by the original number
9 - 312 = -303
-303 ÷ 312 = -0.9711538461538461
-0.9711538461538461 x 100 = -97.12%