1000% is the change from 7 to 77
Calculation steps:
[( 77 - 7 ) ÷ 7] x 100 = 1000%
Formula
Percentage change = [(77 - 7) / 7] x 100
Subtract the new number by the original number
77 - 7 = 70
70 ÷ 7 = 10
10 x 100 = 1000%
Example