-22.73% is the change from 651 to 503
Calculation steps:
[( 503 - 651 ) ÷ 651] x 100 = -22.73%
Formula
Percentage change = [(503 - 651) / 651] x 100
Subtract the new number by the original number
503 - 651 = -148
-148 ÷ 651 = -0.22734254992319508
-0.22734254992319508 x 100 = -22.73%