200% is the change from 1 to 3
Calculation steps:
[( 3 - 1 ) ÷ 1] x 100 = 200%
Formula
Percentage change = [(3 - 1) / 1] x 100
Subtract the new number by the original number
3 - 1 = 2
2 ÷ 1 = 2
2 x 100 = 200%
Example