55.49% is the change from 528 to 821
Calculation steps:
[( 821 - 528 ) ÷ 528] x 100 = 55.49%
Formula
Percentage change = [(821 - 528) / 528] x 100
Subtract the new number by the original number
821 - 528 = 293
293 ÷ 528 = 0.5549242424242424
0.5549242424242424 x 100 = 55.49%