115.29% is the change from 242 to 521
Calculation steps:
[( 521 - 242 ) ÷ 242] x 100 = 115.29%
Formula
Percentage change = [(521 - 242) / 242] x 100
Subtract the new number by the original number
521 - 242 = 279
279 ÷ 242 = 1.1528925619834711
1.1528925619834711 x 100 = 115.29%