-12.62% is the change from 515 to 450
Calculation steps:
[( 450 - 515 ) ÷ 515] x 100 = -12.62%
Formula
Percentage change = [(450 - 515) / 515] x 100
Subtract the new number by the original number
450 - 515 = -65
-65 ÷ 515 = -0.1262135922330097
-0.1262135922330097 x 100 = -12.62%