248.4% is the change from 250 to 871
Calculation steps:
[( 871 - 250 ) ÷ 250] x 100 = 248.4%
Formula
Percentage change = [(871 - 250) / 250] x 100
Subtract the new number by the original number
871 - 250 = 621
621 ÷ 250 = 2.484
2.484 x 100 = 248.4%
Example