300% is the change from 77 to 308
Calculation steps:
[( 308 - 77 ) ÷ 77] x 100 = 300%
Formula
Percentage change = [(308 - 77) / 77] x 100
Subtract the new number by the original number
308 - 77 = 231
231 ÷ 77 = 3
3 x 100 = 300%
Example