-33.2% is the change from 503 to 336
Calculation steps:
[( 336 - 503 ) ÷ 503] x 100 = -33.2%
Formula
Percentage change = [(336 - 503) / 503] x 100
Subtract the new number by the original number
336 - 503 = -167
-167 ÷ 503 = -0.3320079522862823
-0.3320079522862823 x 100 = -33.2%