286.77% is the change from 257 to 994
Calculation steps:
[( 994 - 257 ) ÷ 257] x 100 = 286.77%
Formula
Percentage change = [(994 - 257) / 257] x 100
Subtract the new number by the original number
994 - 257 = 737
737 ÷ 257 = 2.867704280155642
2.867704280155642 x 100 = 286.77%