-56.71% is the change from 917 to 397
Calculation steps:
[( 397 - 917 ) ÷ 917] x 100 = -56.71%
Formula
Percentage change = [(397 - 917) / 917] x 100
Subtract the new number by the original number
397 - 917 = -520
-520 ÷ 917 = -0.5670665212649946
-0.5670665212649946 x 100 = -56.71%