17.77% is the change from 287 to 338
Calculation steps:
[( 338 - 287 ) ÷ 287] x 100 = 17.77%
Formula
Percentage change = [(338 - 287) / 287] x 100
Subtract the new number by the original number
338 - 287 = 51
51 ÷ 287 = 0.17770034843205576
0.17770034843205576 x 100 = 17.77%