-32.16% is the change from 398 to 270
Calculation steps:
[( 270 - 398 ) ÷ 398] x 100 = -32.16%
Formula
Percentage change = [(270 - 398) / 398] x 100
Subtract the new number by the original number
270 - 398 = -128
-128 ÷ 398 = -0.32160804020100503
-0.32160804020100503 x 100 = -32.16%