-7.49% is the change from 721 to 667
Calculation steps:
[( 667 - 721 ) ÷ 721] x 100 = -7.49%
Formula
Percentage change = [(667 - 721) / 721] x 100
Subtract the new number by the original number
667 - 721 = -54
-54 ÷ 721 = -0.07489597780859916
-0.07489597780859916 x 100 = -7.49%