-95.52% is the change from 290 to 13
Calculation steps:
[( 13 - 290 ) ÷ 290] x 100 = -95.52%
Formula
Percentage change = [(13 - 290) / 290] x 100
Subtract the new number by the original number
13 - 290 = -277
-277 ÷ 290 = -0.9551724137931035
-0.9551724137931035 x 100 = -95.52%