-86.21% is the change from 515 to 71
Calculation steps:
[( 71 - 515 ) ÷ 515] x 100 = -86.21%
Formula
Percentage change = [(71 - 515) / 515] x 100
Subtract the new number by the original number
71 - 515 = -444
-444 ÷ 515 = -0.8621359223300971
-0.8621359223300971 x 100 = -86.21%