163.64% is the change from 242 to 638
Calculation steps:
[( 638 - 242 ) ÷ 242] x 100 = 163.64%
Formula
Percentage change = [(638 - 242) / 242] x 100
Subtract the new number by the original number
638 - 242 = 396
396 ÷ 242 = 1.6363636363636365
1.6363636363636365 x 100 = 163.64%