78.11% is the change from 507 to 903
Calculation steps:
[( 903 - 507 ) ÷ 507] x 100 = 78.11%
Formula
Percentage change = [(903 - 507) / 507] x 100
Subtract the new number by the original number
903 - 507 = 396
396 ÷ 507 = 0.7810650887573964
0.7810650887573964 x 100 = 78.11%