250% is the change from 242 to 847
Calculation steps:
[( 847 - 242 ) ÷ 242] x 100 = 250%
Formula
Percentage change = [(847 - 242) / 242] x 100
Subtract the new number by the original number
847 - 242 = 605
605 ÷ 242 = 2.5
2.5 x 100 = 250%
Example