51.2% is the change from 543 to 821
Calculation steps:
[( 821 - 543 ) ÷ 543] x 100 = 51.2%
Formula
Percentage change = [(821 - 543) / 543] x 100
Subtract the new number by the original number
821 - 543 = 278
278 ÷ 543 = 0.5119705340699816
0.5119705340699816 x 100 = 51.2%