49.29% is the change from 280 to 418
Calculation steps:
[( 418 - 280 ) ÷ 280] x 100 = 49.29%
Formula
Percentage change = [(418 - 280) / 280] x 100
Subtract the new number by the original number
418 - 280 = 138
138 ÷ 280 = 0.4928571428571429
0.4928571428571429 x 100 = 49.29%