68.13% is the change from 251 to 422
Calculation steps:
[( 422 - 251 ) ÷ 251] x 100 = 68.13%
Formula
Percentage change = [(422 - 251) / 251] x 100
Subtract the new number by the original number
422 - 251 = 171
171 ÷ 251 = 0.6812749003984063
0.6812749003984063 x 100 = 68.13%