18.6% is the change from 242 to 287
Calculation steps:
[( 287 - 242 ) ÷ 242] x 100 = 18.6%
Formula
Percentage change = [(287 - 242) / 242] x 100
Subtract the new number by the original number
287 - 242 = 45
45 ÷ 242 = 0.1859504132231405
0.1859504132231405 x 100 = 18.6%