27.66% is the change from 329 to 420
Calculation steps:
[( 420 - 329 ) ÷ 329] x 100 = 27.66%
Formula
Percentage change = [(420 - 329) / 329] x 100
Subtract the new number by the original number
420 - 329 = 91
91 ÷ 329 = 0.2765957446808511
0.2765957446808511 x 100 = 27.66%