31.76% is the change from 507 to 668
Calculation steps:
[( 668 - 507 ) ÷ 507] x 100 = 31.76%
Formula
Percentage change = [(668 - 507) / 507] x 100
Subtract the new number by the original number
668 - 507 = 161
161 ÷ 507 = 0.3175542406311637
0.3175542406311637 x 100 = 31.76%