-86.41% is the change from 515 to 70
Calculation steps:
[( 70 - 515 ) ÷ 515] x 100 = -86.41%
Formula
Percentage change = [(70 - 515) / 515] x 100
Subtract the new number by the original number
70 - 515 = -445
-445 ÷ 515 = -0.8640776699029126
-0.8640776699029126 x 100 = -86.41%