18.6% is the change from 285 to 338
Calculation steps:
[( 338 - 285 ) ÷ 285] x 100 = 18.6%
Formula
Percentage change = [(338 - 285) / 285] x 100
Subtract the new number by the original number
338 - 285 = 53
53 ÷ 285 = 0.18596491228070175
0.18596491228070175 x 100 = 18.6%