33900% is the change from 2 to 680
Calculation steps:
[( 680 - 2 ) ÷ 2] x 100 = 33900%
Formula
Percentage change = [(680 - 2) / 2] x 100
Subtract the new number by the original number
680 - 2 = 678
678 ÷ 2 = 339
339 x 100 = 33900%
Example