-47.36% is the change from 397 to 209
Calculation steps:
[( 209 - 397 ) ÷ 397] x 100 = -47.36%
Formula
Percentage change = [(209 - 397) / 397] x 100
Subtract the new number by the original number
209 - 397 = -188
-188 ÷ 397 = -0.473551637279597
-0.473551637279597 x 100 = -47.36%