687.78% is the change from 90 to 709
Calculation steps:
[( 709 - 90 ) ÷ 90] x 100 = 687.78%
Formula
Percentage change = [(709 - 90) / 90] x 100
Subtract the new number by the original number
709 - 90 = 619
619 ÷ 90 = 6.877777777777778
6.877777777777778 x 100 = 687.78%