51.77% is the change from 537 to 815
Calculation steps:
[( 815 - 537 ) ÷ 537] x 100 = 51.77%
Formula
Percentage change = [(815 - 537) / 537] x 100
Subtract the new number by the original number
815 - 537 = 278
278 ÷ 537 = 0.5176908752327747
0.5176908752327747 x 100 = 51.77%