3487.5% is the change from 8 to 287
Calculation steps:
[( 287 - 8 ) ÷ 8] x 100 = 3487.5%
Formula
Percentage change = [(287 - 8) / 8] x 100
Subtract the new number by the original number
287 - 8 = 279
279 ÷ 8 = 34.875
34.875 x 100 = 3487.5%
Example