284.58% is the change from 240 to 923
Calculation steps:
[( 923 - 240 ) ÷ 240] x 100 = 284.58%
Formula
Percentage change = [(923 - 240) / 240] x 100
Subtract the new number by the original number
923 - 240 = 683
683 ÷ 240 = 2.845833333333333
2.845833333333333 x 100 = 284.58%