-81.18% is the change from 526 to 99
Calculation steps:
[( 99 - 526 ) ÷ 526] x 100 = -81.18%
Formula
Percentage change = [(99 - 526) / 526] x 100
Subtract the new number by the original number
99 - 526 = -427
-427 ÷ 526 = -0.811787072243346
-0.811787072243346 x 100 = -81.18%