44.5% is the change from 564 to 815
Calculation steps:
[( 815 - 564 ) ÷ 564] x 100 = 44.5%
Formula
Percentage change = [(815 - 564) / 564] x 100
Subtract the new number by the original number
815 - 564 = 251
251 ÷ 564 = 0.4450354609929078
0.4450354609929078 x 100 = 44.5%