-59.74% is the change from 770 to 310
Calculation steps:
[( 310 - 770 ) ÷ 770] x 100 = -59.74%
Formula
Percentage change = [(310 - 770) / 770] x 100
Subtract the new number by the original number
310 - 770 = -460
-460 ÷ 770 = -0.5974025974025974
-0.5974025974025974 x 100 = -59.74%