-32.41% is the change from 503 to 340
Calculation steps:
[( 340 - 503 ) ÷ 503] x 100 = -32.41%
Formula
Percentage change = [(340 - 503) / 503] x 100
Subtract the new number by the original number
340 - 503 = -163
-163 ÷ 503 = -0.3240556660039761
-0.3240556660039761 x 100 = -32.41%