278.13% is the change from 64 to 242
Calculation steps:
[( 242 - 64 ) ÷ 64] x 100 = 278.13%
Formula
Percentage change = [(242 - 64) / 64] x 100
Subtract the new number by the original number
242 - 64 = 178
178 ÷ 64 = 2.78125
2.78125 x 100 = 278.13%
Example