-21.75% is the change from 515 to 403
Calculation steps:
[( 403 - 515 ) ÷ 515] x 100 = -21.75%
Formula
Percentage change = [(403 - 515) / 515] x 100
Subtract the new number by the original number
403 - 515 = -112
-112 ÷ 515 = -0.2174757281553398
-0.2174757281553398 x 100 = -21.75%