-12.72% is the change from 503 to 439
Calculation steps:
[( 439 - 503 ) ÷ 503] x 100 = -12.72%
Formula
Percentage change = [(439 - 503) / 503] x 100
Subtract the new number by the original number
439 - 503 = -64
-64 ÷ 503 = -0.1272365805168986
-0.1272365805168986 x 100 = -12.72%