291.3% is the change from 230 to 900
Calculation steps:
[( 900 - 230 ) ÷ 230] x 100 = 291.3%
Formula
Percentage change = [(900 - 230) / 230] x 100
Subtract the new number by the original number
900 - 230 = 670
670 ÷ 230 = 2.9130434782608696
2.9130434782608696 x 100 = 291.3%