-51.05% is the change from 811 to 397
Calculation steps:
[( 397 - 811 ) ÷ 811] x 100 = -51.05%
Formula
Percentage change = [(397 - 811) / 811] x 100
Subtract the new number by the original number
397 - 811 = -414
-414 ÷ 811 = -0.5104808877928483
-0.5104808877928483 x 100 = -51.05%