-93.96% is the change from 331 to 20
Calculation steps:
[( 20 - 331 ) ÷ 331] x 100 = -93.96%
Formula
Percentage change = [(20 - 331) / 331] x 100
Subtract the new number by the original number
20 - 331 = -311
-311 ÷ 331 = -0.9395770392749244
-0.9395770392749244 x 100 = -93.96%