298.75% is the change from 240 to 957
Calculation steps:
[( 957 - 240 ) ÷ 240] x 100 = 298.75%
Formula
Percentage change = [(957 - 240) / 240] x 100
Subtract the new number by the original number
957 - 240 = 717
717 ÷ 240 = 2.9875
2.9875 x 100 = 298.75%