283.98% is the change from 256 to 983
Calculation steps:
[( 983 - 256 ) ÷ 256] x 100 = 283.98%
Formula
Percentage change = [(983 - 256) / 256] x 100
Subtract the new number by the original number
983 - 256 = 727
727 ÷ 256 = 2.83984375
2.83984375 x 100 = 283.98%