100% is the change from 77 to 154
Calculation steps:
[( 154 - 77 ) ÷ 77] x 100 = 100%
Formula
Percentage change = [(154 - 77) / 77] x 100
Subtract the new number by the original number
154 - 77 = 77
77 ÷ 77 = 1
1 x 100 = 100%
Example