-8.31% is the change from 361 to 331
Calculation steps:
[( 331 - 361 ) ÷ 361] x 100 = -8.31%
Formula
Percentage change = [(331 - 361) / 361] x 100
Subtract the new number by the original number
331 - 361 = -30
-30 ÷ 361 = -0.08310249307479224
-0.08310249307479224 x 100 = -8.31%