52.34% is the change from 535 to 815
Calculation steps:
[( 815 - 535 ) ÷ 535] x 100 = 52.34%
Formula
Percentage change = [(815 - 535) / 535] x 100
Subtract the new number by the original number
815 - 535 = 280
280 ÷ 535 = 0.5233644859813084
0.5233644859813084 x 100 = 52.34%