20100% is the change from 1 to 202
Calculation steps:
[( 202 - 1 ) ÷ 1] x 100 = 20100%
Formula
Percentage change = [(202 - 1) / 1] x 100
Subtract the new number by the original number
202 - 1 = 201
201 ÷ 1 = 201
201 x 100 = 20100%
Example