-15.15% is the change from 515 to 437
Calculation steps:
[( 437 - 515 ) ÷ 515] x 100 = -15.15%
Formula
Percentage change = [(437 - 515) / 515] x 100
Subtract the new number by the original number
437 - 515 = -78
-78 ÷ 515 = -0.15145631067961166
-0.15145631067961166 x 100 = -15.15%