50.09% is the change from 543 to 815
Calculation steps:
[( 815 - 543 ) ÷ 543] x 100 = 50.09%
Formula
Percentage change = [(815 - 543) / 543] x 100
Subtract the new number by the original number
815 - 543 = 272
272 ÷ 543 = 0.5009208103130756
0.5009208103130756 x 100 = 50.09%