49.3% is the change from 284 to 424
Calculation steps:
[( 424 - 284 ) ÷ 284] x 100 = 49.3%
Formula
Percentage change = [(424 - 284) / 284] x 100
Subtract the new number by the original number
424 - 284 = 140
140 ÷ 284 = 0.49295774647887325
0.49295774647887325 x 100 = 49.3%