-17.63% is the change from 397 to 327
Calculation steps:
[( 327 - 397 ) ÷ 397] x 100 = -17.63%
Formula
Percentage change = [(327 - 397) / 397] x 100
Subtract the new number by the original number
327 - 397 = -70
-70 ÷ 397 = -0.17632241813602015
-0.17632241813602015 x 100 = -17.63%