670% is the change from 10 to 77
Calculation steps:
[( 77 - 10 ) ÷ 10] x 100 = 670%
Formula
Percentage change = [(77 - 10) / 10] x 100
Subtract the new number by the original number
77 - 10 = 67
67 ÷ 10 = 6.7
6.7 x 100 = 670%
Example