72.55% is the change from 306 to 528
Calculation steps:
[( 528 - 306 ) ÷ 306] x 100 = 72.55%
Formula
Percentage change = [(528 - 306) / 306] x 100
Subtract the new number by the original number
528 - 306 = 222
222 ÷ 306 = 0.7254901960784313
0.7254901960784313 x 100 = 72.55%