2183.33% is the change from 30 to 685
Calculation steps:
[( 685 - 30 ) ÷ 30] x 100 = 2183.33%
Formula
Percentage change = [(685 - 30) / 30] x 100
Subtract the new number by the original number
685 - 30 = 655
655 ÷ 30 = 21.833333333333332
21.833333333333332 x 100 = 2183.33%