100% is the change from 168 to 336
Calculation steps:
[( 336 - 168 ) ÷ 168] x 100 = 100%
Formula
Percentage change = [(336 - 168) / 168] x 100
Subtract the new number by the original number
336 - 168 = 168
168 ÷ 168 = 1
1 x 100 = 100%
Example