20000% is the change from 2 to 402
Calculation steps:
[( 402 - 2 ) ÷ 2] x 100 = 20000%
Formula
Percentage change = [(402 - 2) / 2] x 100
Subtract the new number by the original number
402 - 2 = 400
400 ÷ 2 = 200
200 x 100 = 20000%
Example