-87.53% is the change from 409 to 51
Calculation steps:
[( 51 - 409 ) ÷ 409] x 100 = -87.53%
Formula
Percentage change = [(51 - 409) / 409] x 100
Subtract the new number by the original number
51 - 409 = -358
-358 ÷ 409 = -0.8753056234718827
-0.8753056234718827 x 100 = -87.53%