250.19% is the change from 257 to 900
Calculation steps:
[( 900 - 257 ) ÷ 257] x 100 = 250.19%
Formula
Percentage change = [(900 - 257) / 257] x 100
Subtract the new number by the original number
900 - 257 = 643
643 ÷ 257 = 2.501945525291829
2.501945525291829 x 100 = 250.19%