-31.19% is the change from 481 to 331
Calculation steps:
[( 331 - 481 ) ÷ 481] x 100 = -31.19%
Formula
Percentage change = [(331 - 481) / 481] x 100
Subtract the new number by the original number
331 - 481 = -150
-150 ÷ 481 = -0.31185031185031187
-0.31185031185031187 x 100 = -31.19%