-39.88% is the change from 331 to 199
Calculation steps:
[( 199 - 331 ) ÷ 331] x 100 = -39.88%
Formula
Percentage change = [(199 - 331) / 331] x 100
Subtract the new number by the original number
199 - 331 = -132
-132 ÷ 331 = -0.3987915407854985
-0.3987915407854985 x 100 = -39.88%