-51.7% is the change from 822 to 397
Calculation steps:
[( 397 - 822 ) ÷ 822] x 100 = -51.7%
Formula
Percentage change = [(397 - 822) / 822] x 100
Subtract the new number by the original number
397 - 822 = -425
-425 ÷ 822 = -0.5170316301703163
-0.5170316301703163 x 100 = -51.7%