-87.12% is the change from 520 to 67
Calculation steps:
[( 67 - 520 ) ÷ 520] x 100 = -87.12%
Formula
Percentage change = [(67 - 520) / 520] x 100
Subtract the new number by the original number
67 - 520 = -453
-453 ÷ 520 = -0.8711538461538462
-0.8711538461538462 x 100 = -87.12%