-7.14% is the change from 770 to 715
Calculation steps:
[( 715 - 770 ) ÷ 770] x 100 = -7.14%
Formula
Percentage change = [(715 - 770) / 770] x 100
Subtract the new number by the original number
715 - 770 = -55
-55 ÷ 770 = -0.07142857142857142
-0.07142857142857142 x 100 = -7.14%