-6.9% is the change from 768 to 715
Calculation steps:
[( 715 - 768 ) ÷ 768] x 100 = -6.9%
Formula
Percentage change = [(715 - 768) / 768] x 100
Subtract the new number by the original number
715 - 768 = -53
-53 ÷ 768 = -0.06901041666666667
-0.06901041666666667 x 100 = -6.9%