76.55% is the change from 290 to 512
Calculation steps:
[( 512 - 290 ) ÷ 290] x 100 = 76.55%
Formula
Percentage change = [(512 - 290) / 290] x 100
Subtract the new number by the original number
512 - 290 = 222
222 ÷ 290 = 0.7655172413793103
0.7655172413793103 x 100 = 76.55%