-26.03% is the change from 680 to 503
Calculation steps:
[( 503 - 680 ) ÷ 680] x 100 = -26.03%
Formula
Percentage change = [(503 - 680) / 680] x 100
Subtract the new number by the original number
503 - 680 = -177
-177 ÷ 680 = -0.26029411764705884
-0.26029411764705884 x 100 = -26.03%