266% is the change from 250 to 915
Calculation steps:
[( 915 - 250 ) ÷ 250] x 100 = 266%
Formula
Percentage change = [(915 - 250) / 250] x 100
Subtract the new number by the original number
915 - 250 = 665
665 ÷ 250 = 2.66
2.66 x 100 = 266%
Example