-69.09% is the change from 275 to 85
Calculation steps:
[( 85 - 275 ) ÷ 275] x 100 = -69.09%
Formula
Percentage change = [(85 - 275) / 275] x 100
Subtract the new number by the original number
85 - 275 = -190
-190 ÷ 275 = -0.6909090909090909
-0.6909090909090909 x 100 = -69.09%