30.18% is the change from 507 to 660
Calculation steps:
[( 660 - 507 ) ÷ 507] x 100 = 30.18%
Formula
Percentage change = [(660 - 507) / 507] x 100
Subtract the new number by the original number
660 - 507 = 153
153 ÷ 507 = 0.30177514792899407
0.30177514792899407 x 100 = 30.18%