-66.49% is the change from 770 to 258
Calculation steps:
[( 258 - 770 ) ÷ 770] x 100 = -66.49%
Formula
Percentage change = [(258 - 770) / 770] x 100
Subtract the new number by the original number
258 - 770 = -512
-512 ÷ 770 = -0.6649350649350649
-0.6649350649350649 x 100 = -66.49%