870% is the change from 70 to 679
Calculation steps:
[( 679 - 70 ) ÷ 70] x 100 = 870%
Formula
Percentage change = [(679 - 70) / 70] x 100
Subtract the new number by the original number
679 - 70 = 609
609 ÷ 70 = 8.7
8.7 x 100 = 870%
Example