-29.03% is the change from 503 to 357
Calculation steps:
[( 357 - 503 ) ÷ 503] x 100 = -29.03%
Formula
Percentage change = [(357 - 503) / 503] x 100
Subtract the new number by the original number
357 - 503 = -146
-146 ÷ 503 = -0.29025844930417494
-0.29025844930417494 x 100 = -29.03%