256.12% is the change from 278 to 990
Calculation steps:
[( 990 - 278 ) ÷ 278] x 100 = 256.12%
Formula
Percentage change = [(990 - 278) / 278] x 100
Subtract the new number by the original number
990 - 278 = 712
712 ÷ 278 = 2.5611510791366907
2.5611510791366907 x 100 = 256.12%