-18.06% is the change from 515 to 422
Calculation steps:
[( 422 - 515 ) ÷ 515] x 100 = -18.06%
Formula
Percentage change = [(422 - 515) / 515] x 100
Subtract the new number by the original number
422 - 515 = -93
-93 ÷ 515 = -0.18058252427184465
-0.18058252427184465 x 100 = -18.06%