252.87% is the change from 261 to 921
Calculation steps:
[( 921 - 261 ) ÷ 261] x 100 = 252.87%
Formula
Percentage change = [(921 - 261) / 261] x 100
Subtract the new number by the original number
921 - 261 = 660
660 ÷ 261 = 2.528735632183908
2.528735632183908 x 100 = 252.87%