-22.67% is the change from 397 to 307
Calculation steps:
[( 307 - 397 ) ÷ 397] x 100 = -22.67%
Formula
Percentage change = [(307 - 397) / 397] x 100
Subtract the new number by the original number
307 - 397 = -90
-90 ÷ 397 = -0.22670025188916876
-0.22670025188916876 x 100 = -22.67%