280.58% is the change from 242 to 921
Calculation steps:
[( 921 - 242 ) ÷ 242] x 100 = 280.58%
Formula
Percentage change = [(921 - 242) / 242] x 100
Subtract the new number by the original number
921 - 242 = 679
679 ÷ 242 = 2.8057851239669422
2.8057851239669422 x 100 = 280.58%