259.06% is the change from 276 to 991
Calculation steps:
[( 991 - 276 ) ÷ 276] x 100 = 259.06%
Formula
Percentage change = [(991 - 276) / 276] x 100
Subtract the new number by the original number
991 - 276 = 715
715 ÷ 276 = 2.5905797101449277
2.5905797101449277 x 100 = 259.06%