56.9% is the change from 290 to 455
Calculation steps:
[( 455 - 290 ) ÷ 290] x 100 = 56.9%
Formula
Percentage change = [(455 - 290) / 290] x 100
Subtract the new number by the original number
455 - 290 = 165
165 ÷ 290 = 0.5689655172413793
0.5689655172413793 x 100 = 56.9%