60.75% is the change from 507 to 815
Calculation steps:
[( 815 - 507 ) ÷ 507] x 100 = 60.75%
Formula
Percentage change = [(815 - 507) / 507] x 100
Subtract the new number by the original number
815 - 507 = 308
308 ÷ 507 = 0.6074950690335306
0.6074950690335306 x 100 = 60.75%