-57.36% is the change from 931 to 397
Calculation steps:
[( 397 - 931 ) ÷ 931] x 100 = -57.36%
Formula
Percentage change = [(397 - 931) / 931] x 100
Subtract the new number by the original number
397 - 931 = -534
-534 ÷ 931 = -0.5735767991407089
-0.5735767991407089 x 100 = -57.36%