-16.89% is the change from 515 to 428
Calculation steps:
[( 428 - 515 ) ÷ 515] x 100 = -16.89%
Formula
Percentage change = [(428 - 515) / 515] x 100
Subtract the new number by the original number
428 - 515 = -87
-87 ÷ 515 = -0.16893203883495145
-0.16893203883495145 x 100 = -16.89%