245.56% is the change from 90 to 311
Calculation steps:
[( 311 - 90 ) ÷ 90] x 100 = 245.56%
Formula
Percentage change = [(311 - 90) / 90] x 100
Subtract the new number by the original number
311 - 90 = 221
221 ÷ 90 = 2.4555555555555557
2.4555555555555557 x 100 = 245.56%