272.56% is the change from 266 to 991
Calculation steps:
[( 991 - 266 ) ÷ 266] x 100 = 272.56%
Formula
Percentage change = [(991 - 266) / 266] x 100
Subtract the new number by the original number
991 - 266 = 725
725 ÷ 266 = 2.725563909774436
2.725563909774436 x 100 = 272.56%