309.09% is the change from 77 to 315
Calculation steps:
[( 315 - 77 ) ÷ 77] x 100 = 309.09%
Formula
Percentage change = [(315 - 77) / 77] x 100
Subtract the new number by the original number
315 - 77 = 238
238 ÷ 77 = 3.090909090909091
3.090909090909091 x 100 = 309.09%