6.62% is the change from 287 to 306
Calculation steps:
[( 306 - 287 ) ÷ 287] x 100 = 6.62%
Formula
Percentage change = [(306 - 287) / 287] x 100
Subtract the new number by the original number
306 - 287 = 19
19 ÷ 287 = 0.06620209059233449
0.06620209059233449 x 100 = 6.62%