-46.91% is the change from 405 to 215
Calculation steps:
[( 215 - 405 ) ÷ 405] x 100 = -46.91%
Formula
Percentage change = [(215 - 405) / 405] x 100
Subtract the new number by the original number
215 - 405 = -190
-190 ÷ 405 = -0.4691358024691358
-0.4691358024691358 x 100 = -46.91%