-91.48% is the change from 399 to 34
Calculation steps:
[( 34 - 399 ) ÷ 399] x 100 = -91.48%
Formula
Percentage change = [(34 - 399) / 399] x 100
Subtract the new number by the original number
34 - 399 = -365
-365 ÷ 399 = -0.9147869674185464
-0.9147869674185464 x 100 = -91.48%