-97.49% is the change from 398 to 10
Calculation steps:
[( 10 - 398 ) ÷ 398] x 100 = -97.49%
Formula
Percentage change = [(10 - 398) / 398] x 100
Subtract the new number by the original number
10 - 398 = -388
-388 ÷ 398 = -0.9748743718592965
-0.9748743718592965 x 100 = -97.49%