-66.36% is the change from 770 to 259
Calculation steps:
[( 259 - 770 ) ÷ 770] x 100 = -66.36%
Formula
Percentage change = [(259 - 770) / 770] x 100
Subtract the new number by the original number
259 - 770 = -511
-511 ÷ 770 = -0.6636363636363637
-0.6636363636363637 x 100 = -66.36%