-12.54% is the change from 287 to 251
Calculation steps:
[( 251 - 287 ) ÷ 287] x 100 = -12.54%
Formula
Percentage change = [(251 - 287) / 287] x 100
Subtract the new number by the original number
251 - 287 = -36
-36 ÷ 287 = -0.1254355400696864
-0.1254355400696864 x 100 = -12.54%