306.25% is the change from 240 to 975
Calculation steps:
[( 975 - 240 ) ÷ 240] x 100 = 306.25%
Formula
Percentage change = [(975 - 240) / 240] x 100
Subtract the new number by the original number
975 - 240 = 735
735 ÷ 240 = 3.0625
3.0625 x 100 = 306.25%