61.07% is the change from 280 to 451
Calculation steps:
[( 451 - 280 ) ÷ 280] x 100 = 61.07%
Formula
Percentage change = [(451 - 280) / 280] x 100
Subtract the new number by the original number
451 - 280 = 171
171 ÷ 280 = 0.6107142857142858
0.6107142857142858 x 100 = 61.07%