-12.89% is the change from 768 to 669
Calculation steps:
[( 669 - 768 ) ÷ 768] x 100 = -12.89%
Formula
Percentage change = [(669 - 768) / 768] x 100
Subtract the new number by the original number
669 - 768 = -99
-99 ÷ 768 = -0.12890625
-0.12890625 x 100 = -12.89%