-78.89% is the change from 398 to 84
Calculation steps:
[( 84 - 398 ) ÷ 398] x 100 = -78.89%
Formula
Percentage change = [(84 - 398) / 398] x 100
Subtract the new number by the original number
84 - 398 = -314
-314 ÷ 398 = -0.7889447236180904
-0.7889447236180904 x 100 = -78.89%