-51.46% is the change from 824 to 400
Calculation steps:
[( 400 - 824 ) ÷ 824] x 100 = -51.46%
Formula
Percentage change = [(400 - 824) / 824] x 100
Subtract the new number by the original number
400 - 824 = -424
-424 ÷ 824 = -0.5145631067961165
-0.5145631067961165 x 100 = -51.46%