279.31% is the change from 261 to 990
Calculation steps:
[( 990 - 261 ) ÷ 261] x 100 = 279.31%
Formula
Percentage change = [(990 - 261) / 261] x 100
Subtract the new number by the original number
990 - 261 = 729
729 ÷ 261 = 2.793103448275862
2.793103448275862 x 100 = 279.31%