30.37% is the change from 507 to 661
Calculation steps:
[( 661 - 507 ) ÷ 507] x 100 = 30.37%
Formula
Percentage change = [(661 - 507) / 507] x 100
Subtract the new number by the original number
661 - 507 = 154
154 ÷ 507 = 0.3037475345167653
0.3037475345167653 x 100 = 30.37%