25.07% is the change from 670 to 838
Calculation steps:
[( 838 - 670 ) ÷ 670] x 100 = 25.07%
Formula
Percentage change = [(838 - 670) / 670] x 100
Subtract the new number by the original number
838 - 670 = 168
168 ÷ 670 = 0.2507462686567164
0.2507462686567164 x 100 = 25.07%