3.57% is the change from 280 to 290
Calculation steps:
[( 290 - 280 ) ÷ 280] x 100 = 3.57%
Formula
Percentage change = [(290 - 280) / 280] x 100
Subtract the new number by the original number
290 - 280 = 10
10 ÷ 280 = 0.03571428571428571
0.03571428571428571 x 100 = 3.57%