-19.64% is the change from 667 to 536
Calculation steps:
[( 536 - 667 ) ÷ 667] x 100 = -19.64%
Formula
Percentage change = [(536 - 667) / 667] x 100
Subtract the new number by the original number
536 - 667 = -131
-131 ÷ 667 = -0.19640179910044978
-0.19640179910044978 x 100 = -19.64%