315.15% is the change from 66 to 274
Calculation steps:
[( 274 - 66 ) ÷ 66] x 100 = 315.15%
Formula
Percentage change = [(274 - 66) / 66] x 100
Subtract the new number by the original number
274 - 66 = 208
208 ÷ 66 = 3.1515151515151514
3.1515151515151514 x 100 = 315.15%