-87.47% is the change from 391 to 49
Calculation steps:
[( 49 - 391 ) ÷ 391] x 100 = -87.47%
Formula
Percentage change = [(49 - 391) / 391] x 100
Subtract the new number by the original number
49 - 391 = -342
-342 ÷ 391 = -0.8746803069053708
-0.8746803069053708 x 100 = -87.47%