75.95% is the change from 291 to 512
Calculation steps:
[( 512 - 291 ) ÷ 291] x 100 = 75.95%
Formula
Percentage change = [(512 - 291) / 291] x 100
Subtract the new number by the original number
512 - 291 = 221
221 ÷ 291 = 0.7594501718213058
0.7594501718213058 x 100 = 75.95%