45.17% is the change from 290 to 421
Calculation steps:
[( 421 - 290 ) ÷ 290] x 100 = 45.17%
Formula
Percentage change = [(421 - 290) / 290] x 100
Subtract the new number by the original number
421 - 290 = 131
131 ÷ 290 = 0.4517241379310345
0.4517241379310345 x 100 = 45.17%