280.6% is the change from 67 to 255
Calculation steps:
[( 255 - 67 ) ÷ 67] x 100 = 280.6%
Formula
Percentage change = [(255 - 67) / 67] x 100
Subtract the new number by the original number
255 - 67 = 188
188 ÷ 67 = 2.8059701492537314
2.8059701492537314 x 100 = 280.6%