68.92% is the change from 251 to 424
Calculation steps:
[( 424 - 251 ) ÷ 251] x 100 = 68.92%
Formula
Percentage change = [(424 - 251) / 251] x 100
Subtract the new number by the original number
424 - 251 = 173
173 ÷ 251 = 0.6892430278884463
0.6892430278884463 x 100 = 68.92%