-57.72% is the change from 939 to 397
Calculation steps:
[( 397 - 939 ) ÷ 939] x 100 = -57.72%
Formula
Percentage change = [(397 - 939) / 939] x 100
Subtract the new number by the original number
397 - 939 = -542
-542 ÷ 939 = -0.577209797657082
-0.577209797657082 x 100 = -57.72%