78.1% is the change from 274 to 488
Calculation steps:
[( 488 - 274 ) ÷ 274] x 100 = 78.1%
Formula
Percentage change = [(488 - 274) / 274] x 100
Subtract the new number by the original number
488 - 274 = 214
214 ÷ 274 = 0.781021897810219
0.781021897810219 x 100 = 78.1%