-14.57% is the change from 398 to 340
Calculation steps:
[( 340 - 398 ) ÷ 398] x 100 = -14.57%
Formula
Percentage change = [(340 - 398) / 398] x 100
Subtract the new number by the original number
340 - 398 = -58
-58 ÷ 398 = -0.1457286432160804
-0.1457286432160804 x 100 = -14.57%