-30.48% is the change from 397 to 276
Calculation steps:
[( 276 - 397 ) ÷ 397] x 100 = -30.48%
Formula
Percentage change = [(276 - 397) / 397] x 100
Subtract the new number by the original number
276 - 397 = -121
-121 ÷ 397 = -0.3047858942065491
-0.3047858942065491 x 100 = -30.48%