-39.2% is the change from 398 to 242
Calculation steps:
[( 242 - 398 ) ÷ 398] x 100 = -39.2%
Formula
Percentage change = [(242 - 398) / 398] x 100
Subtract the new number by the original number
242 - 398 = -156
-156 ÷ 398 = -0.39195979899497485
-0.39195979899497485 x 100 = -39.2%