-24.83% is the change from 286 to 215
Calculation steps:
[( 215 - 286 ) ÷ 286] x 100 = -24.83%
Formula
Percentage change = [(215 - 286) / 286] x 100
Subtract the new number by the original number
215 - 286 = -71
-71 ÷ 286 = -0.24825174825174826
-0.24825174825174826 x 100 = -24.83%
Example