-29.65% is the change from 715 to 503
Calculation steps:
[( 503 - 715 ) ÷ 715] x 100 = -29.65%
Formula
Percentage change = [(503 - 715) / 715] x 100
Subtract the new number by the original number
503 - 715 = -212
-212 ÷ 715 = -0.2965034965034965
-0.2965034965034965 x 100 = -29.65%