54.43% is the change from 531 to 820
Calculation steps:
[( 820 - 531 ) ÷ 531] x 100 = 54.43%
Formula
Percentage change = [(820 - 531) / 531] x 100
Subtract the new number by the original number
820 - 531 = 289
289 ÷ 531 = 0.544256120527307
0.544256120527307 x 100 = 54.43%