-6.62% is the change from 287 to 268
Calculation steps:
[( 268 - 287 ) ÷ 287] x 100 = -6.62%
Formula
Percentage change = [(268 - 287) / 287] x 100
Subtract the new number by the original number
268 - 287 = -19
-19 ÷ 287 = -0.06620209059233449
-0.06620209059233449 x 100 = -6.62%