-68.05% is the change from 266 to 85
Calculation steps:
[( 85 - 266 ) ÷ 266] x 100 = -68.05%
Formula
Percentage change = [(85 - 266) / 266] x 100
Subtract the new number by the original number
85 - 266 = -181
-181 ÷ 266 = -0.6804511278195489
-0.6804511278195489 x 100 = -68.05%