259.5% is the change from 242 to 870
Calculation steps:
[( 870 - 242 ) ÷ 242] x 100 = 259.5%
Formula
Percentage change = [(870 - 242) / 242] x 100
Subtract the new number by the original number
870 - 242 = 628
628 ÷ 242 = 2.5950413223140494
2.5950413223140494 x 100 = 259.5%