3280% is the change from 20 to 676
Calculation steps:
[( 676 - 20 ) ÷ 20] x 100 = 3280%
Formula
Percentage change = [(676 - 20) / 20] x 100
Subtract the new number by the original number
676 - 20 = 656
656 ÷ 20 = 32.8
32.8 x 100 = 3280%
Example