-29.82% is the change from 503 to 353
Calculation steps:
[( 353 - 503 ) ÷ 503] x 100 = -29.82%
Formula
Percentage change = [(353 - 503) / 503] x 100
Subtract the new number by the original number
353 - 503 = -150
-150 ÷ 503 = -0.2982107355864811
-0.2982107355864811 x 100 = -29.82%