-8.1% is the change from 778 to 715
Calculation steps:
[( 715 - 778 ) ÷ 778] x 100 = -8.1%
Formula
Percentage change = [(715 - 778) / 778] x 100
Subtract the new number by the original number
715 - 778 = -63
-63 ÷ 778 = -0.08097686375321336
-0.08097686375321336 x 100 = -8.1%