100% is the change from 153 to 306
Calculation steps:
[( 306 - 153 ) ÷ 153] x 100 = 100%
Formula
Percentage change = [(306 - 153) / 153] x 100
Subtract the new number by the original number
306 - 153 = 153
153 ÷ 153 = 1
1 x 100 = 100%
Example