302.6% is the change from 77 to 310
Calculation steps:
[( 310 - 77 ) ÷ 77] x 100 = 302.6%
Formula
Percentage change = [(310 - 77) / 77] x 100
Subtract the new number by the original number
310 - 77 = 233
233 ÷ 77 = 3.0259740259740258
3.0259740259740258 x 100 = 302.6%