-54.18% is the change from 251 to 115
Calculation steps:
[( 115 - 251 ) ÷ 251] x 100 = -54.18%
Formula
Percentage change = [(115 - 251) / 251] x 100
Subtract the new number by the original number
115 - 251 = -136
-136 ÷ 251 = -0.5418326693227091
-0.5418326693227091 x 100 = -54.18%