-96.45% is the change from 310 to 11
Calculation steps:
[( 11 - 310 ) ÷ 310] x 100 = -96.45%
Formula
Percentage change = [(11 - 310) / 310] x 100
Subtract the new number by the original number
11 - 310 = -299
-299 ÷ 310 = -0.964516129032258
-0.964516129032258 x 100 = -96.45%