-22.11% is the change from 398 to 310
Calculation steps:
[( 310 - 398 ) ÷ 398] x 100 = -22.11%
Formula
Percentage change = [(310 - 398) / 398] x 100
Subtract the new number by the original number
310 - 398 = -88
-88 ÷ 398 = -0.22110552763819097
-0.22110552763819097 x 100 = -22.11%