-98.87% is the change from 266 to 3
Calculation steps:
[( 3 - 266 ) ÷ 266] x 100 = -98.87%
Formula
Percentage change = [(3 - 266) / 266] x 100
Subtract the new number by the original number
3 - 266 = -263
-263 ÷ 266 = -0.9887218045112782
-0.9887218045112782 x 100 = -98.87%