-46.51% is the change from 215 to 115
Calculation steps:
[( 115 - 215 ) ÷ 215] x 100 = -46.51%
Formula
Percentage change = [(115 - 215) / 215] x 100
Subtract the new number by the original number
115 - 215 = -100
-100 ÷ 215 = -0.46511627906976744
-0.46511627906976744 x 100 = -46.51%