32000% is the change from 2 to 642
Calculation steps:
[( 642 - 2 ) ÷ 2] x 100 = 32000%
Formula
Percentage change = [(642 - 2) / 2] x 100
Subtract the new number by the original number
642 - 2 = 640
640 ÷ 2 = 320
320 x 100 = 32000%
Example