-30.73% is the change from 397 to 275
Calculation steps:
[( 275 - 397 ) ÷ 397] x 100 = -30.73%
Formula
Percentage change = [(275 - 397) / 397] x 100
Subtract the new number by the original number
275 - 397 = -122
-122 ÷ 397 = -0.30730478589420657
-0.30730478589420657 x 100 = -30.73%