-3.3% is the change from 515 to 498
Calculation steps:
[( 498 - 515 ) ÷ 515] x 100 = -3.3%
Formula
Percentage change = [(498 - 515) / 515] x 100
Subtract the new number by the original number
498 - 515 = -17
-17 ÷ 515 = -0.03300970873786408
-0.03300970873786408 x 100 = -3.3%