-50.86% is the change from 405 to 199
Calculation steps:
[( 199 - 405 ) ÷ 405] x 100 = -50.86%
Formula
Percentage change = [(199 - 405) / 405] x 100
Subtract the new number by the original number
199 - 405 = -206
-206 ÷ 405 = -0.508641975308642
-0.508641975308642 x 100 = -50.86%