-94.56% is the change from 331 to 18
Calculation steps:
[( 18 - 331 ) ÷ 331] x 100 = -94.56%
Formula
Percentage change = [(18 - 331) / 331] x 100
Subtract the new number by the original number
18 - 331 = -313
-313 ÷ 331 = -0.945619335347432
-0.945619335347432 x 100 = -94.56%