-82.89% is the change from 409 to 70
Calculation steps:
[( 70 - 409 ) ÷ 409] x 100 = -82.89%
Formula
Percentage change = [(70 - 409) / 409] x 100
Subtract the new number by the original number
70 - 409 = -339
-339 ÷ 409 = -0.8288508557457213
-0.8288508557457213 x 100 = -82.89%