-32.6% is the change from 503 to 339
Calculation steps:
[( 339 - 503 ) ÷ 503] x 100 = -32.6%
Formula
Percentage change = [(339 - 503) / 503] x 100
Subtract the new number by the original number
339 - 503 = -164
-164 ÷ 503 = -0.3260437375745527
-0.3260437375745527 x 100 = -32.6%