-45.36% is the change from 399 to 218
Calculation steps:
[( 218 - 399 ) ÷ 399] x 100 = -45.36%
Formula
Percentage change = [(218 - 399) / 399] x 100
Subtract the new number by the original number
218 - 399 = -181
-181 ÷ 399 = -0.45363408521303256
-0.45363408521303256 x 100 = -45.36%