-51.87% is the change from 827 to 398
Calculation steps:
[( 398 - 827 ) ÷ 827] x 100 = -51.87%
Formula
Percentage change = [(398 - 827) / 827] x 100
Subtract the new number by the original number
398 - 827 = -429
-429 ÷ 827 = -0.5187424425634825
-0.5187424425634825 x 100 = -51.87%