-87.78% is the change from 409 to 50
Calculation steps:
[( 50 - 409 ) ÷ 409] x 100 = -87.78%
Formula
Percentage change = [(50 - 409) / 409] x 100
Subtract the new number by the original number
50 - 409 = -359
-359 ÷ 409 = -0.8777506112469438
-0.8777506112469438 x 100 = -87.78%