284.11% is the change from 258 to 991
Calculation steps:
[( 991 - 258 ) ÷ 258] x 100 = 284.11%
Formula
Percentage change = [(991 - 258) / 258] x 100
Subtract the new number by the original number
991 - 258 = 733
733 ÷ 258 = 2.8410852713178296
2.8410852713178296 x 100 = 284.11%