-94.72% is the change from 398 to 21
Calculation steps:
[( 21 - 398 ) ÷ 398] x 100 = -94.72%
Formula
Percentage change = [(21 - 398) / 398] x 100
Subtract the new number by the original number
21 - 398 = -377
-377 ÷ 398 = -0.9472361809045227
-0.9472361809045227 x 100 = -94.72%