311.76% is the change from 68 to 280
Calculation steps:
[( 280 - 68 ) ÷ 68] x 100 = 311.76%
Formula
Percentage change = [(280 - 68) / 68] x 100
Subtract the new number by the original number
280 - 68 = 212
212 ÷ 68 = 3.1176470588235294
3.1176470588235294 x 100 = 311.76%