67.17% is the change from 329 to 550
Calculation steps:
[( 550 - 329 ) ÷ 329] x 100 = 67.17%
Formula
Percentage change = [(550 - 329) / 329] x 100
Subtract the new number by the original number
550 - 329 = 221
221 ÷ 329 = 0.6717325227963525
0.6717325227963525 x 100 = 67.17%