-31% is the change from 729 to 503
Calculation steps:
[( 503 - 729 ) ÷ 729] x 100 = -31%
Formula
Percentage change = [(503 - 729) / 729] x 100
Subtract the new number by the original number
503 - 729 = -226
-226 ÷ 729 = -0.3100137174211248
-0.3100137174211248 x 100 = -31%