-2.93% is the change from 512 to 497
Calculation steps:
[( 497 - 512 ) ÷ 512] x 100 = -2.93%
Formula
Percentage change = [(497 - 512) / 512] x 100
Subtract the new number by the original number
497 - 512 = -15
-15 ÷ 512 = -0.029296875
-0.029296875 x 100 = -2.93%