48.62% is the change from 290 to 431
Calculation steps:
[( 431 - 290 ) ÷ 290] x 100 = 48.62%
Formula
Percentage change = [(431 - 290) / 290] x 100
Subtract the new number by the original number
431 - 290 = 141
141 ÷ 290 = 0.4862068965517241
0.4862068965517241 x 100 = 48.62%