100% is the change from 101 to 202
Calculation steps:
[( 202 - 101 ) ÷ 101] x 100 = 100%
Formula
Percentage change = [(202 - 101) / 101] x 100
Subtract the new number by the original number
202 - 101 = 101
101 ÷ 101 = 1
1 x 100 = 100%
Example