51.07% is the change from 280 to 423
Calculation steps:
[( 423 - 280 ) ÷ 280] x 100 = 51.07%
Formula
Percentage change = [(423 - 280) / 280] x 100
Subtract the new number by the original number
423 - 280 = 143
143 ÷ 280 = 0.5107142857142857
0.5107142857142857 x 100 = 51.07%