-50.97% is the change from 826 to 405
Calculation steps:
[( 405 - 826 ) ÷ 826] x 100 = -50.97%
Formula
Percentage change = [(405 - 826) / 826] x 100
Subtract the new number by the original number
405 - 826 = -421
-421 ÷ 826 = -0.5096852300242131
-0.5096852300242131 x 100 = -50.97%