-34.51% is the change from 397 to 260
Calculation steps:
[( 260 - 397 ) ÷ 397] x 100 = -34.51%
Formula
Percentage change = [(260 - 397) / 397] x 100
Subtract the new number by the original number
260 - 397 = -137
-137 ÷ 397 = -0.345088161209068
-0.345088161209068 x 100 = -34.51%