247.11% is the change from 242 to 840
Calculation steps:
[( 840 - 242 ) ÷ 242] x 100 = 247.11%
Formula
Percentage change = [(840 - 242) / 242] x 100
Subtract the new number by the original number
840 - 242 = 598
598 ÷ 242 = 2.4710743801652892
2.4710743801652892 x 100 = 247.11%