28.35% is the change from 515 to 661
Calculation steps:
[( 661 - 515 ) ÷ 515] x 100 = 28.35%
Formula
Percentage change = [(661 - 515) / 515] x 100
Subtract the new number by the original number
661 - 515 = 146
146 ÷ 515 = 0.283495145631068
0.283495145631068 x 100 = 28.35%