277.94% is the change from 68 to 257
Calculation steps:
[( 257 - 68 ) ÷ 68] x 100 = 277.94%
Formula
Percentage change = [(257 - 68) / 68] x 100
Subtract the new number by the original number
257 - 68 = 189
189 ÷ 68 = 2.7794117647058822
2.7794117647058822 x 100 = 277.94%