-39.6% is the change from 399 to 241
Calculation steps:
[( 241 - 399 ) ÷ 399] x 100 = -39.6%
Formula
Percentage change = [(241 - 399) / 399] x 100
Subtract the new number by the original number
241 - 399 = -158
-158 ÷ 399 = -0.39598997493734334
-0.39598997493734334 x 100 = -39.6%