8.71% is the change from 287 to 312
Calculation steps:
[( 312 - 287 ) ÷ 287] x 100 = 8.71%
Formula
Percentage change = [(312 - 287) / 287] x 100
Subtract the new number by the original number
312 - 287 = 25
25 ÷ 287 = 0.08710801393728224
0.08710801393728224 x 100 = 8.71%