-83.84% is the change from 526 to 85
Calculation steps:
[( 85 - 526 ) ÷ 526] x 100 = -83.84%
Formula
Percentage change = [(85 - 526) / 526] x 100
Subtract the new number by the original number
85 - 526 = -441
-441 ÷ 526 = -0.8384030418250951
-0.8384030418250951 x 100 = -83.84%