207.2% is the change from 250 to 768
Calculation steps:
[( 768 - 250 ) ÷ 250] x 100 = 207.2%
Formula
Percentage change = [(768 - 250) / 250] x 100
Subtract the new number by the original number
768 - 250 = 518
518 ÷ 250 = 2.072
2.072 x 100 = 207.2%
Example