661.11% is the change from 90 to 685
Calculation steps:
[( 685 - 90 ) ÷ 90] x 100 = 661.11%
Formula
Percentage change = [(685 - 90) / 90] x 100
Subtract the new number by the original number
685 - 90 = 595
595 ÷ 90 = 6.611111111111111
6.611111111111111 x 100 = 661.11%