-81.58% is the change from 266 to 49
Calculation steps:
[( 49 - 266 ) ÷ 266] x 100 = -81.58%
Formula
Percentage change = [(49 - 266) / 266] x 100
Subtract the new number by the original number
49 - 266 = -217
-217 ÷ 266 = -0.8157894736842105
-0.8157894736842105 x 100 = -81.58%