-82.46% is the change from 399 to 70
Calculation steps:
[( 70 - 399 ) ÷ 399] x 100 = -82.46%
Formula
Percentage change = [(70 - 399) / 399] x 100
Subtract the new number by the original number
70 - 399 = -329
-329 ÷ 399 = -0.8245614035087719
-0.8245614035087719 x 100 = -82.46%