770.13% is the change from 77 to 670
Calculation steps:
[( 670 - 77 ) ÷ 77] x 100 = 770.13%
Formula
Percentage change = [(670 - 77) / 77] x 100
Subtract the new number by the original number
670 - 77 = 593
593 ÷ 77 = 7.701298701298701
7.701298701298701 x 100 = 770.13%