-1% is the change from 401 to 397
Calculation steps:
[( 397 - 401 ) ÷ 401] x 100 = -1%
Formula
Percentage change = [(397 - 401) / 401] x 100
Subtract the new number by the original number
397 - 401 = -4
-4 ÷ 401 = -0.00997506234413965
-0.00997506234413965 x 100 = -1%